19 files changed, 1552 insertions, 77 deletions

diff --git a/editor/animation_track_editor.cpp b/editor/animation_track_editor.cpp
index 2307d340d8..9f6fa74dd3 100644
--- a/editor/animation_track_editor.cpp
+++ b/editor/animation_track_editor.cpp
@@ -936,7 +936,7 @@ void AnimationTimelineEdit::_notification(int p_what) {
 
 					if (frame != prev_frame && i >= prev_frame_ofs) {
 
-						draw_line(Point2(get_name_limit() + i, 0), Point2(get_name_limit() + i, h), linecolor);
+						draw_line(Point2(get_name_limit() + i, 0), Point2(get_name_limit() + i, h), linecolor, Math::round(EDSCALE));
 
 						draw_string(font, Point2(get_name_limit() + i + 3 * EDSCALE, (h - font->get_height()) / 2 + font->get_ascent()).floor(), itos(frame), sub ? color_time_dec : color_time_sec, zoomw - i);
 						prev_frame_ofs = i + font->get_string_size(itos(frame)).x + 5 * EDSCALE;
@@ -957,13 +957,13 @@ void AnimationTimelineEdit::_notification(int p_what) {
 				if ((sc / step) != (prev_sc / step) || (prev_sc < 0 && sc >= 0)) {
 
 					int scd = sc < 0 ? prev_sc : sc;
-					draw_line(Point2(get_name_limit() + i, 0), Point2(get_name_limit() + i, h), linecolor);
+					draw_line(Point2(get_name_limit() + i, 0), Point2(get_name_limit() + i, h), linecolor, Math::round(EDSCALE));
 					draw_string(font, Point2(get_name_limit() + i + 3, (h - font->get_height()) / 2 + font->get_ascent()).floor(), String::num((scd - (scd % step)) / double(SC_ADJ), decimals), sub ? color_time_dec : color_time_sec, zoomw - i);
 				}
 			}
 		}
 
-		draw_line(Vector2(0, get_size().height), get_size(), linecolor);
+		draw_line(Vector2(0, get_size().height), get_size(), linecolor, Math::round(EDSCALE));
 	}
 }
 
@@ -1041,7 +1041,7 @@ void AnimationTimelineEdit::_play_position_draw() {
 
 	if (px >= get_name_limit() && px < (play_position->get_size().width - get_buttons_width())) {
 		Color color = get_color("accent_color", "Editor");
-		play_position->draw_line(Point2(px, 0), Point2(px, h), color);
+		play_position->draw_line(Point2(px, 0), Point2(px, h), color, Math::round(EDSCALE));
 	}
 }
 
@@ -1310,7 +1310,7 @@ void AnimationTrackEdit::_notification(int p_what) {
 			string_pos = string_pos.floor();
 			draw_string(font, string_pos, text, text_color, limit - ofs - hsep);
 
-			draw_line(Point2(limit, 0), Point2(limit, get_size().height), linecolor);
+			draw_line(Point2(limit, 0), Point2(limit, get_size().height), linecolor, Math::round(EDSCALE));
 		}
 
 		// KEYFAMES //
@@ -1370,7 +1370,7 @@ void AnimationTrackEdit::_notification(int p_what) {
 
 			Ref<Texture> down_icon = get_icon("select_arrow", "Tree");
 
-			draw_line(Point2(ofs, 0), Point2(ofs, get_size().height), linecolor);
+			draw_line(Point2(ofs, 0), Point2(ofs, get_size().height), linecolor, Math::round(EDSCALE));
 
 			ofs += hsep;
 			{
@@ -1417,7 +1417,7 @@ void AnimationTrackEdit::_notification(int p_what) {
 				}
 
 				ofs += down_icon->get_width();
-				draw_line(Point2(ofs + hsep * 0.5, 0), Point2(ofs + hsep * 0.5, get_size().height), linecolor);
+				draw_line(Point2(ofs + hsep * 0.5, 0), Point2(ofs + hsep * 0.5, get_size().height), linecolor, Math::round(EDSCALE));
 				ofs += hsep;
 			}
 
@@ -1450,7 +1450,7 @@ void AnimationTrackEdit::_notification(int p_what) {
 				}
 
 				ofs += down_icon->get_width();
-				draw_line(Point2(ofs + hsep * 0.5, 0), Point2(ofs + hsep * 0.5, get_size().height), linecolor);
+				draw_line(Point2(ofs + hsep * 0.5, 0), Point2(ofs + hsep * 0.5, get_size().height), linecolor, Math::round(EDSCALE));
 				ofs += hsep;
 			}
 
@@ -1483,7 +1483,7 @@ void AnimationTrackEdit::_notification(int p_what) {
 				}
 
 				ofs += down_icon->get_width();
-				draw_line(Point2(ofs + hsep * 0.5, 0), Point2(ofs + hsep * 0.5, get_size().height), linecolor);
+				draw_line(Point2(ofs + hsep * 0.5, 0), Point2(ofs + hsep * 0.5, get_size().height), linecolor, Math::round(EDSCALE));
 				ofs += hsep;
 			}
 
@@ -1501,17 +1501,17 @@ void AnimationTrackEdit::_notification(int p_what) {
 		}
 
 		if (in_group) {
-			draw_line(Vector2(timeline->get_name_limit(), get_size().height), get_size(), linecolor);
+			draw_line(Vector2(timeline->get_name_limit(), get_size().height), get_size(), linecolor, Math::round(EDSCALE));
 		} else {
-			draw_line(Vector2(0, get_size().height), get_size(), linecolor);
+			draw_line(Vector2(0, get_size().height), get_size(), linecolor, Math::round(EDSCALE));
 		}
 
 		if (dropping_at != 0) {
 			Color drop_color = get_color("accent_color", "Editor");
 			if (dropping_at < 0) {
-				draw_line(Vector2(0, 0), Vector2(get_size().width, 0), drop_color);
+				draw_line(Vector2(0, 0), Vector2(get_size().width, 0), drop_color, Math::round(EDSCALE));
 			} else {
-				draw_line(Vector2(0, get_size().height), get_size(), drop_color);
+				draw_line(Vector2(0, get_size().height), get_size(), drop_color, Math::round(EDSCALE));
 			}
 		}
 	}
@@ -1560,7 +1560,7 @@ void AnimationTrackEdit::draw_key_link(int p_index, float p_pixels_sec, int p_x,
 	int from_x = MAX(p_x, p_clip_left);
 	int to_x = MIN(p_next_x, p_clip_right);
 
-	draw_line(Point2(from_x + 1, get_size().height / 2), Point2(to_x, get_size().height / 2), color, 2);
+	draw_line(Point2(from_x + 1, get_size().height / 2), Point2(to_x, get_size().height / 2), color, Math::round(2 * EDSCALE));
 }
 
 void AnimationTrackEdit::draw_key(int p_index, float p_pixels_sec, int p_x, bool p_selected, int p_clip_left, int p_clip_right) {
@@ -1740,7 +1740,7 @@ void AnimationTrackEdit::_play_position_draw() {
 
 	if (px >= timeline->get_name_limit() && px < (get_size().width - timeline->get_buttons_width())) {
 		Color color = get_color("accent_color", "Editor");
-		play_position->draw_line(Point2(px, 0), Point2(px, h), color);
+		play_position->draw_line(Point2(px, 0), Point2(px, h), color, Math::round(EDSCALE));
 	}
 }
 
@@ -2443,9 +2443,9 @@ void AnimationTrackEditGroup::_notification(int p_what) {
 		Color linecolor = color;
 		linecolor.a = 0.2;
 
-		draw_line(Point2(), Point2(get_size().width, 0), linecolor);
-		draw_line(Point2(timeline->get_name_limit(), 0), Point2(timeline->get_name_limit(), get_size().height), linecolor);
-		draw_line(Point2(get_size().width - timeline->get_buttons_width(), 0), Point2(get_size().width - timeline->get_buttons_width(), get_size().height), linecolor);
+		draw_line(Point2(), Point2(get_size().width, 0), linecolor, Math::round(EDSCALE));
+		draw_line(Point2(timeline->get_name_limit(), 0), Point2(timeline->get_name_limit(), get_size().height), linecolor, Math::round(EDSCALE));
+		draw_line(Point2(get_size().width - timeline->get_buttons_width(), 0), Point2(get_size().width - timeline->get_buttons_width(), get_size().height), linecolor, Math::round(EDSCALE));
 
 		int ofs = 0;
 		draw_texture(icon, Point2(ofs, int(get_size().height - icon->get_height()) / 2));
@@ -2456,7 +2456,7 @@ void AnimationTrackEditGroup::_notification(int p_what) {
 
 		if (px >= timeline->get_name_limit() && px < (get_size().width - timeline->get_buttons_width())) {
 			Color accent = get_color("accent_color", "Editor");
-			draw_line(Point2(px, 0), Point2(px, get_size().height), accent);
+			draw_line(Point2(px, 0), Point2(px, get_size().height), accent, Math::round(EDSCALE));
 		}
 	}
 }
@@ -2540,7 +2540,7 @@ void AnimationTrackEditor::set_animation(const Ref<Animation> &p_anim) {
 		step->set_block_signals(false);
 		step->set_read_only(false);
 		snap->set_disabled(false);
-		snap_mode->set_disabled(true);
+		snap_mode->set_disabled(false);
 	} else {
 		hscroll->hide();
 		edit->set_disabled(true);
@@ -2549,7 +2549,7 @@ void AnimationTrackEditor::set_animation(const Ref<Animation> &p_anim) {
 		step->set_block_signals(false);
 		step->set_read_only(true);
 		snap->set_disabled(true);
-		snap_mode->set_disabled(false);
+		snap_mode->set_disabled(true);
 	}
 }
 
diff --git a/editor/doc/doc_data.cpp b/editor/doc/doc_data.cpp
index 8f1d0d9677..c2a492bc9a 100644
--- a/editor/doc/doc_data.cpp
+++ b/editor/doc/doc_data.cpp
@@ -54,7 +54,6 @@ void DocData::merge_from(const DocData &p_data) {
 		c.description = cf.description;
 		c.brief_description = cf.brief_description;
 		c.tutorials = cf.tutorials;
-		c.demos = cf.demos;
 
 		for (int i = 0; i < c.methods.size(); i++) {
 
@@ -837,10 +836,6 @@ Error DocData::_load(Ref<XMLParser> parser) {
 						} else if (parser->get_node_type() == XMLParser::NODE_ELEMENT_END && parser->get_node_name() == "tutorials")
 							break; //end of <tutorials>
 					}
-				} else if (name2 == "demos") {
-					parser->read();
-					if (parser->get_node_type() == XMLParser::NODE_TEXT)
-						c.demos = parser->get_node_data();
 				} else if (name2 == "methods") {
 
 					Error err2 = _parse_methods(parser, c.methods);
@@ -987,8 +982,7 @@ Error DocData::save_classes(const String &p_default_path, const Map<String, Stri
 		FileAccessRef f = FileAccess::open(save_file, FileAccess::WRITE, &err);
 		if (err) {
 			ERR_EXPLAIN("Can't write doc file: " + save_file);
-
-			ERR_FAIL_V(err);
+			ERR_CONTINUE(err);
 		}
 
 		_write_string(f, 0, "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>");
@@ -1015,9 +1009,6 @@ Error DocData::save_classes(const String &p_default_path, const Map<String, Stri
 			_write_string(f, 2, "<link>" + c.tutorials.get(i).xml_escape() + "</link>");
 		}
 		_write_string(f, 1, "</tutorials>");
-		_write_string(f, 1, "<demos>");
-		_write_string(f, 2, c.demos.strip_edges().xml_escape());
-		_write_string(f, 1, "</demos>");
 		_write_string(f, 1, "<methods>");
 
 		c.methods.sort();
diff --git a/editor/doc/doc_data.h b/editor/doc/doc_data.h
index 8156acd3d0..d3844adb7e 100644
--- a/editor/doc/doc_data.h
+++ b/editor/doc/doc_data.h
@@ -86,7 +86,6 @@ public:
 		String brief_description;
 		String description;
 		Vector<String> tutorials;
-		String demos;
 		Vector<MethodDoc> methods;
 		Vector<MethodDoc> signals;
 		Vector<ConstantDoc> constants;
diff --git a/editor/editor_atlas_packer.cpp b/editor/editor_atlas_packer.cpp
new file mode 100644
index 0000000000..4e1d98399a
--- /dev/null
+++ b/editor/editor_atlas_packer.cpp
@@ -0,0 +1,265 @@
+#include "editor_atlas_packer.h"
+
+void EditorAtlasPacker::_plot_triangle(Ref<BitMap> p_bitmap, Vector2i *vertices) {
+
+	int width = p_bitmap->get_size().width;
+	int height = p_bitmap->get_size().height;
+	int x[3];
+	int y[3];
+
+	for (int j = 0; j < 3; j++) {
+
+		x[j] = vertices[j].x;
+		y[j] = vertices[j].y;
+	}
+
+	// sort the points vertically
+	if (y[1] > y[2]) {
+		SWAP(x[1], x[2]);
+		SWAP(y[1], y[2]);
+	}
+	if (y[0] > y[1]) {
+		SWAP(x[0], x[1]);
+		SWAP(y[0], y[1]);
+	}
+	if (y[1] > y[2]) {
+		SWAP(x[1], x[2]);
+		SWAP(y[1], y[2]);
+	}
+
+	double dx_far = double(x[2] - x[0]) / (y[2] - y[0] + 1);
+	double dx_upper = double(x[1] - x[0]) / (y[1] - y[0] + 1);
+	double dx_low = double(x[2] - x[1]) / (y[2] - y[1] + 1);
+	double xf = x[0];
+	double xt = x[0] + dx_upper; // if y[0] == y[1], special case
+	for (int yi = y[0]; yi <= (y[2] > height - 1 ? height - 1 : y[2]); yi++) {
+		if (yi >= 0) {
+			for (int xi = (xf > 0 ? int(xf) : 0); xi <= (xt < width ? xt : width - 1); xi++) {
+				//pixels[int(x + y * width)] = color;
+
+				p_bitmap->set_bit(Point2(xi, yi), true);
+			}
+
+			for (int xi = (xf < width ? int(xf) : width - 1); xi >= (xt > 0 ? xt : 0); xi--) {
+
+				p_bitmap->set_bit(Point2(xi, yi), true);
+			}
+		}
+		xf += dx_far;
+		if (yi < y[1])
+			xt += dx_upper;
+		else
+			xt += dx_low;
+	}
+}
+void EditorAtlasPacker::chart_pack(Vector<Chart> &charts, int &r_width, int &r_height, int p_atlas_max_size, int p_cell_resolution) {
+
+	int divide_by = MIN(64, p_cell_resolution);
+	Vector<PlottedBitmap> bitmaps;
+
+	int max_w = 0;
+
+	for (int i = 0; i < charts.size(); i++) {
+
+		const Chart &chart = charts[i];
+
+		//generate aabb
+
+		Rect2i aabb;
+		int vertex_count = chart.vertices.size();
+		const Vector2 *vertices = chart.vertices.ptr();
+
+		for (int j = 0; j < vertex_count; j++) {
+
+			if (j == 0) {
+				aabb.position = vertices[j];
+			} else {
+				aabb.expand_to(vertices[j]);
+			}
+		}
+
+		Ref<BitMap> src_bitmap;
+		src_bitmap.instance();
+		src_bitmap->create(aabb.size / divide_by);
+
+		int w = src_bitmap->get_size().width;
+		int h = src_bitmap->get_size().height;
+
+		//plot triangles, using divisor
+
+		for (int j = 0; j < chart.faces.size(); j++) {
+
+			Vector2i v[3];
+			for (int k = 0; k < 3; k++) {
+				Vector2 vtx = chart.vertices[chart.faces[j].vertex[k]];
+				vtx -= aabb.position;
+				vtx /= divide_by;
+				v[k] = vtx;
+			}
+
+			_plot_triangle(src_bitmap, v);
+		}
+
+		//src_bitmap->convert_to_image()->save_png("bitmap" + itos(i) + ".png");
+
+		//grow by 1 for each side
+
+		int bmw = src_bitmap->get_size().width + 2;
+		int bmh = src_bitmap->get_size().height + 2;
+
+		int heights_size = -1;
+		bool transpose = false;
+		if (chart.can_transpose && bmh > bmw) {
+			heights_size = bmh;
+			transpose = true;
+		} else {
+			heights_size = bmw;
+		}
+
+		max_w = MAX(max_w, heights_size);
+
+		Vector<int> top_heights;
+		Vector<int> bottom_heights;
+		top_heights.resize(heights_size);
+		bottom_heights.resize(heights_size);
+
+		for (int x = 0; x < heights_size; x++) {
+			top_heights.write[x] = -1;
+			bottom_heights.write[x] = 0x7FFFFFFF;
+		}
+
+		for (int x = 0; x < bmw; x++) {
+			for (int y = 0; y < bmh; y++) {
+				bool found_pixel = false;
+				for (int lx = x - 1; lx < x + 2 && !found_pixel; lx++) {
+					for (int ly = y - 1; ly < y + 2 && !found_pixel; ly++) {
+
+						int px = lx - 1;
+						if (px < 0 || px >= w)
+							continue;
+						int py = ly - 1;
+						if (py < 0 || py >= h)
+							continue;
+
+						if (src_bitmap->get_bit(Vector2(px, py))) {
+							found_pixel = true;
+						}
+					}
+				}
+				if (found_pixel) {
+
+					if (transpose) {
+						if (x > top_heights[y]) {
+							top_heights.write[y] = x;
+						}
+						if (x < bottom_heights[y]) {
+							bottom_heights.write[y] = x;
+						}
+					} else {
+						if (y > top_heights[x]) {
+							top_heights.write[x] = y;
+						}
+						if (y < bottom_heights[x]) {
+							bottom_heights.write[x] = y;
+						}
+					}
+				}
+			}
+		}
+
+		String row;
+		for (int j = 0; j < top_heights.size(); j++) {
+			row += "(" + itos(top_heights[j]) + "-" + itos(bottom_heights[j]) + "),";
+		}
+
+		PlottedBitmap plotted_bitmap;
+		plotted_bitmap.offset = aabb.position;
+		plotted_bitmap.top_heights = top_heights;
+		plotted_bitmap.bottom_heights = bottom_heights;
+		plotted_bitmap.chart_index = i;
+		plotted_bitmap.transposed = transpose;
+		plotted_bitmap.area = bmw * bmh;
+
+		bitmaps.push_back(plotted_bitmap);
+	}
+
+	bitmaps.sort();
+
+	int atlas_max_width = nearest_power_of_2_templated(p_atlas_max_size) / divide_by;
+	int atlas_w = nearest_power_of_2_templated(max_w);
+	int atlas_h;
+	while (true) {
+		atlas_h = 0;
+
+		//do a tetris
+		Vector<int> heights;
+		heights.resize(atlas_w);
+		for (int i = 0; i < atlas_w; i++) {
+			heights.write[i] = 0;
+		}
+
+		int *atlas_ptr = heights.ptrw();
+
+		for (int i = 0; i < bitmaps.size(); i++) {
+
+			int best_height = 0x7FFFFFFF;
+			int best_height_offset = -1;
+			int w = bitmaps[i].top_heights.size();
+
+			const int *top_heights = bitmaps[i].top_heights.ptr();
+			const int *bottom_heights = bitmaps[i].bottom_heights.ptr();
+
+			for (int j = 0; j < atlas_w - w; j++) {
+
+				int height = 0;
+
+				for (int k = 0; k < w; k++) {
+
+					int pixmap_h = bottom_heights[k];
+					if (pixmap_h == -1) {
+						continue; //no pixel here, anything is fine
+					}
+
+					int h = MAX(0, atlas_ptr[j + k] - pixmap_h);
+					if (h > height) {
+						height = h;
+					}
+				}
+
+				if (height < best_height) {
+					best_height = height;
+					best_height_offset = j;
+				}
+			}
+
+			for (int j = 0; j < w; j++) { //add
+				if (top_heights[j] == -1) { //unused
+					continue;
+				}
+				int height = best_height + top_heights[j] + 1;
+				atlas_ptr[j + best_height_offset] = height;
+				atlas_h = MAX(atlas_h, height);
+			}
+
+			// set
+			Vector2 offset = bitmaps[i].offset;
+			if (bitmaps[i].transposed) {
+				SWAP(offset.x, offset.y);
+			}
+
+			Vector2 final_pos = Vector2(best_height_offset * divide_by, best_height * divide_by) + Vector2(divide_by, divide_by) - offset;
+			charts.write[bitmaps[i].chart_index].final_offset = final_pos;
+			charts.write[bitmaps[i].chart_index].transposed = bitmaps[i].transposed;
+		}
+
+		if (atlas_h <= atlas_w * 2 || atlas_w >= atlas_max_width) {
+			break; //ok this one is enough
+		}
+
+		//try again
+		atlas_w *= 2;
+	}
+
+	r_width = atlas_w * divide_by;
+	r_height = atlas_h * divide_by;
+}
diff --git a/editor/editor_atlas_packer.h b/editor/editor_atlas_packer.h
new file mode 100644
index 0000000000..dd9caa340e
--- /dev/null
+++ b/editor/editor_atlas_packer.h
@@ -0,0 +1,45 @@
+#ifndef EDITOR_ATLAS_PACKER_H
+#define EDITOR_ATLAS_PACKER_H
+
+#include "core/math/vector2.h"
+
+#include "core/vector.h"
+#include "scene/resources/bit_map.h"
+
+class EditorAtlasPacker {
+public:
+	struct Chart {
+		Vector<Vector2> vertices;
+		struct Face {
+			int vertex[3];
+		};
+		Vector<Face> faces;
+		bool can_transpose;
+
+		Vector2 final_offset;
+		bool transposed;
+	};
+
+private:
+	struct PlottedBitmap {
+		int chart_index;
+		Vector2i offset;
+		int area;
+		Vector<int> top_heights;
+		Vector<int> bottom_heights;
+		bool transposed;
+
+		Vector2 final_pos;
+
+		bool operator<(const PlottedBitmap &p_bm) const {
+			return area > p_bm.area;
+		}
+	};
+
+	static void _plot_triangle(Ref<BitMap> p_bitmap, Vector2i *vertices);
+
+public:
+	static void chart_pack(Vector<Chart> &charts, int &r_width, int &r_height, int p_atlas_max_size = 2048, int p_cell_resolution = 4);
+};
+
+#endif // EDITOR_ATLAS_PACKER_H
diff --git a/editor/editor_file_system.cpp b/editor/editor_file_system.cpp
index 3d9d5e26be..abd3bea951 100644
--- a/editor/editor_file_system.cpp
+++ b/editor/editor_file_system.cpp
@@ -43,7 +43,7 @@
 
 EditorFileSystem *EditorFileSystem::singleton = NULL;
 //the name is the version, to keep compatibility with different versions of Godot
-#define CACHE_FILE_NAME "filesystem_cache5"
+#define CACHE_FILE_NAME "filesystem_cache6"
 
 void EditorFileSystemDirectory::sort_files() {
 
@@ -241,7 +241,7 @@ void EditorFileSystem::_scan_filesystem() {
 
 			} else {
 				Vector<String> split = l.split("::");
-				ERR_CONTINUE(split.size() != 7);
+				ERR_CONTINUE(split.size() != 8);
 				String name = split[0];
 				String file;
 
@@ -253,11 +253,12 @@ void EditorFileSystem::_scan_filesystem() {
 				fc.modification_time = split[2].to_int64();
 				fc.import_modification_time = split[3].to_int64();
 				fc.import_valid = split[4].to_int64() != 0;
-				fc.script_class_name = split[5].get_slice("<>", 0);
-				fc.script_class_extends = split[5].get_slice("<>", 1);
-				fc.script_class_icon_path = split[5].get_slice("<>", 2);
+				fc.import_group_file = split[5].strip_edges();
+				fc.script_class_name = split[6].get_slice("<>", 0);
+				fc.script_class_extends = split[6].get_slice("<>", 1);
+				fc.script_class_icon_path = split[6].get_slice("<>", 2);
 
-				String deps = split[6].strip_edges();
+				String deps = split[7].strip_edges();
 				if (deps.length()) {
 					Vector<String> dp = deps.split("<>");
 					for (int i = 0; i < dp.size(); i++) {
@@ -318,6 +319,9 @@ void EditorFileSystem::_scan_filesystem() {
 }
 
 void EditorFileSystem::_save_filesystem_cache() {
+
+	group_file_cache.clear();
+
 	String fscache = EditorSettings::get_singleton()->get_project_settings_dir().plus_file(CACHE_FILE_NAME);
 
 	FileAccess *f = FileAccess::open(fscache, FileAccess::WRITE);
@@ -771,6 +775,7 @@ void EditorFileSystem::_scan_new_dir(EditorFileSystemDirectory *p_dir, DirAccess
 
 				fi->import_valid = fc->import_valid;
 				fi->script_class_name = fc->script_class_name;
+				fi->import_group_file = fc->import_group_file;
 				fi->script_class_extends = fc->script_class_extends;
 				fi->script_class_icon_path = fc->script_class_icon_path;
 
@@ -784,6 +789,7 @@ void EditorFileSystem::_scan_new_dir(EditorFileSystemDirectory *p_dir, DirAccess
 
 				if (fc->type == String()) {
 					fi->type = ResourceLoader::get_resource_type(path);
+					fi->import_group_file = ResourceLoader::get_import_group_file(path);
 					//there is also the chance that file type changed due to reimport, must probably check this somehow here (or kind of note it for next time in another file?)
 					//note: I think this should not happen any longer..
 				}
@@ -791,6 +797,7 @@ void EditorFileSystem::_scan_new_dir(EditorFileSystemDirectory *p_dir, DirAccess
 			} else {
 
 				fi->type = ResourceFormatImporter::get_singleton()->get_resource_type(path);
+				fi->import_group_file = ResourceFormatImporter::get_singleton()->get_import_group_file(path);
 				fi->script_class_name = _get_global_script_class(fi->type, path, &fi->script_class_extends, &fi->script_class_icon_path);
 				fi->modified_time = 0;
 				fi->import_modified_time = 0;
@@ -918,6 +925,7 @@ void EditorFileSystem::_scan_fs_changes(EditorFileSystemDirectory *p_dir, const
 					fi->type = ResourceLoader::get_resource_type(path);
 					fi->script_class_name = _get_global_script_class(fi->type, path, &fi->script_class_extends, &fi->script_class_icon_path);
 					fi->import_valid = ResourceLoader::is_import_valid(path);
+					fi->import_group_file = ResourceLoader::get_import_group_file(path);
 
 					{
 						ItemAction ia;
@@ -1187,7 +1195,10 @@ void EditorFileSystem::_save_filesystem_cache(EditorFileSystemDirectory *p_dir,
 
 	for (int i = 0; i < p_dir->files.size(); i++) {
 
-		String s = p_dir->files[i]->file + "::" + p_dir->files[i]->type + "::" + itos(p_dir->files[i]->modified_time) + "::" + itos(p_dir->files[i]->import_modified_time) + "::" + itos(p_dir->files[i]->import_valid) + "::" + p_dir->files[i]->script_class_name + "<>" + p_dir->files[i]->script_class_extends + "<>" + p_dir->files[i]->script_class_icon_path;
+		if (p_dir->files[i]->import_group_file != String()) {
+			group_file_cache.insert(p_dir->files[i]->import_group_file);
+		}
+		String s = p_dir->files[i]->file + "::" + p_dir->files[i]->type + "::" + itos(p_dir->files[i]->modified_time) + "::" + itos(p_dir->files[i]->import_modified_time) + "::" + itos(p_dir->files[i]->import_valid) + "::" + p_dir->files[i]->import_group_file + "::" + p_dir->files[i]->script_class_name + "<>" + p_dir->files[i]->script_class_extends + "<>" + p_dir->files[i]->script_class_icon_path;
 		s += "::";
 		for (int j = 0; j < p_dir->files[i]->deps.size(); j++) {
 
@@ -1523,6 +1534,7 @@ void EditorFileSystem::update_file(const String &p_file) {
 
 	fs->files[cpos]->type = type;
 	fs->files[cpos]->script_class_name = _get_global_script_class(type, p_file, &fs->files[cpos]->script_class_extends, &fs->files[cpos]->script_class_icon_path);
+	fs->files[cpos]->import_group_file = ResourceLoader::get_import_group_file(p_file);
 	fs->files[cpos]->modified_time = FileAccess::get_modified_time(p_file);
 	fs->files[cpos]->deps = _get_dependencies(p_file);
 	fs->files[cpos]->import_valid = ResourceLoader::is_import_valid(p_file);
@@ -1534,6 +1546,168 @@ void EditorFileSystem::update_file(const String &p_file) {
 	_queue_update_script_classes();
 }
 
+Error EditorFileSystem::_reimport_group(const String &p_group_file, const Vector<String> &p_files) {
+
+	String importer_name;
+
+	Map<String, Map<StringName, Variant> > source_file_options;
+	Map<String, String> base_paths;
+	for (int i = 0; i < p_files.size(); i++) {
+
+		Ref<ConfigFile> config;
+		config.instance();
+		Error err = config->load(p_files[i] + ".import");
+		ERR_CONTINUE(err != OK);
+		ERR_CONTINUE(!config->has_section_key("remap", "importer"));
+		String file_importer_name = config->get_value("remap", "importer");
+		ERR_CONTINUE(file_importer_name == String());
+
+		if (importer_name != String() && importer_name != file_importer_name) {
+			print_line("one importer: " + importer_name + " the other: " + file_importer_name);
+			EditorNode::get_singleton()->show_warning(vformat(TTR("There are multiple importers for different types pointing to file %s, import aborted"), p_group_file));
+			ERR_FAIL_V(ERR_FILE_CORRUPT);
+		}
+
+		source_file_options[p_files[i]] = Map<StringName, Variant>();
+		importer_name = file_importer_name;
+
+		Ref<ResourceImporter> importer = ResourceFormatImporter::get_singleton()->get_importer_by_name(importer_name);
+		ERR_FAIL_COND_V(!importer.is_valid(), ERR_FILE_CORRUPT);
+		List<ResourceImporter::ImportOption> options;
+		importer->get_import_options(&options);
+		//set default values
+		for (List<ResourceImporter::ImportOption>::Element *E = options.front(); E; E = E->next()) {
+
+			source_file_options[p_files[i]][E->get().option.name] = E->get().default_value;
+		}
+
+		if (config->has_section("params")) {
+			List<String> sk;
+			config->get_section_keys("params", &sk);
+			for (List<String>::Element *E = sk.front(); E; E = E->next()) {
+				String param = E->get();
+				Variant value = config->get_value("params", param);
+				//override with whathever is in file
+				source_file_options[p_files[i]][param] = value;
+			}
+		}
+
+		base_paths[p_files[i]] = ResourceFormatImporter::get_singleton()->get_import_base_path(p_files[i]);
+	}
+
+	ERR_FAIL_COND_V(importer_name == String(), ERR_UNCONFIGURED);
+
+	Ref<ResourceImporter> importer = ResourceFormatImporter::get_singleton()->get_importer_by_name(importer_name);
+
+	Error err = importer->import_group_file(p_group_file, source_file_options, base_paths);
+
+	//all went well, overwrite config files with proper remaps and md5s
+	for (Map<String, Map<StringName, Variant> >::Element *E = source_file_options.front(); E; E = E->next()) {
+
+		String file = E->key();
+		String base_path = ResourceFormatImporter::get_singleton()->get_import_base_path(file);
+		FileAccessRef f = FileAccess::open(file + ".import", FileAccess::WRITE);
+		ERR_FAIL_COND_V(!f, ERR_FILE_CANT_OPEN);
+
+		//write manually, as order matters ([remap] has to go first for performance).
+		f->store_line("[remap]");
+		f->store_line("");
+		f->store_line("importer=\"" + importer->get_importer_name() + "\"");
+		if (importer->get_resource_type() != "") {
+			f->store_line("type=\"" + importer->get_resource_type() + "\"");
+		}
+
+		Vector<String> dest_paths;
+
+		if (err == OK) {
+			String path = base_path + "." + importer->get_save_extension();
+			f->store_line("path=\"" + path + "\"");
+			dest_paths.push_back(path);
+		}
+
+		f->store_line("group_file=" + Variant(p_group_file).get_construct_string());
+
+		if (err == OK) {
+			f->store_line("valid=true");
+		} else {
+			f->store_line("valid=false");
+		}
+		f->store_line("[deps]\n");
+
+		f->store_line("");
+
+		f->store_line("source_file=" + Variant(file).get_construct_string());
+		if (dest_paths.size()) {
+			Array dp;
+			for (int i = 0; i < dest_paths.size(); i++) {
+				dp.push_back(dest_paths[i]);
+			}
+			f->store_line("dest_files=" + Variant(dp).get_construct_string() + "\n");
+		}
+		f->store_line("[params]");
+		f->store_line("");
+
+		//store options in provided order, to avoid file changing. Order is also important because first match is accepted first.
+
+		List<ResourceImporter::ImportOption> options;
+		importer->get_import_options(&options);
+		//set default values
+		for (List<ResourceImporter::ImportOption>::Element *F = options.front(); F; F = F->next()) {
+
+			String base = F->get().option.name;
+			Variant v = F->get().default_value;
+			if (source_file_options[file].has(base)) {
+				v = source_file_options[file][base];
+			}
+			String value;
+			VariantWriter::write_to_string(v, value);
+			f->store_line(base + "=" + value);
+		}
+
+		f->close();
+
+		// Store the md5's of the various files. These are stored separately so that the .import files can be version controlled.
+		FileAccessRef md5s = FileAccess::open(base_path + ".md5", FileAccess::WRITE);
+		ERR_FAIL_COND_V(!md5s, ERR_FILE_CANT_OPEN);
+
+		md5s->store_line("source_md5=\"" + FileAccess::get_md5(file) + "\"");
+		if (dest_paths.size()) {
+			md5s->store_line("dest_md5=\"" + FileAccess::get_multiple_md5(dest_paths) + "\"\n");
+		}
+		md5s->close();
+
+		EditorFileSystemDirectory *fs = NULL;
+		int cpos = -1;
+		bool found = _find_file(file, &fs, cpos);
+		ERR_FAIL_COND_V(!found, ERR_UNCONFIGURED);
+
+		//update modified times, to avoid reimport
+		fs->files[cpos]->modified_time = FileAccess::get_modified_time(file);
+		fs->files[cpos]->import_modified_time = FileAccess::get_modified_time(file + ".import");
+		fs->files[cpos]->deps = _get_dependencies(file);
+		fs->files[cpos]->type = importer->get_resource_type();
+		fs->files[cpos]->import_valid = err == OK;
+
+		//if file is currently up, maybe the source it was loaded from changed, so import math must be updated for it
+		//to reload properly
+		if (ResourceCache::has(file)) {
+
+			Resource *r = ResourceCache::get(file);
+
+			if (r->get_import_path() != String()) {
+
+				String dst_path = ResourceFormatImporter::get_singleton()->get_internal_resource_path(file);
+				r->set_import_path(dst_path);
+				r->set_import_last_modified_time(0);
+			}
+		}
+
+		EditorResourcePreview::get_singleton()->check_for_invalidation(file);
+	}
+
+	return err;
+}
+
 void EditorFileSystem::_reimport_file(const String &p_file) {
 
 	EditorFileSystemDirectory *fs = NULL;
@@ -1738,6 +1912,24 @@ void EditorFileSystem::_reimport_file(const String &p_file) {
 	EditorResourcePreview::get_singleton()->check_for_invalidation(p_file);
 }
 
+void EditorFileSystem::_find_group_files(EditorFileSystemDirectory *efd, Map<String, Vector<String> > &group_files, Set<String> &groups_to_reimport) {
+
+	int fc = efd->files.size();
+	const EditorFileSystemDirectory::FileInfo *const *files = efd->files.ptr();
+	for (int i = 0; i < fc; i++) {
+		if (groups_to_reimport.has(files[i]->import_group_file)) {
+			if (!group_files.has(files[i]->import_group_file)) {
+				group_files[files[i]->import_group_file] = Vector<String>();
+			}
+			group_files[files[i]->import_group_file].push_back(efd->get_file_path(i));
+		}
+	}
+
+	for (int i = 0; i < efd->get_subdir_count(); i++) {
+		_find_group_files(efd->get_subdir(i), group_files, groups_to_reimport);
+	}
+}
+
 void EditorFileSystem::reimport_files(const Vector<String> &p_files) {
 
 	{ //check that .import folder exists
@@ -1757,22 +1949,58 @@ void EditorFileSystem::reimport_files(const Vector<String> &p_files) {
 	EditorProgress pr("reimport", TTR("(Re)Importing Assets"), p_files.size());
 
 	Vector<ImportFile> files;
+	Set<String> groups_to_reimport;
 
 	for (int i = 0; i < p_files.size(); i++) {
-		ImportFile ifile;
-		ifile.path = p_files[i];
-		ifile.order = ResourceFormatImporter::get_singleton()->get_import_order(p_files[i]);
-		files.push_back(ifile);
+
+		String group_file = ResourceFormatImporter::get_singleton()->get_import_group_file(p_files[i]);
+
+		if (group_file_cache.has(p_files[i])) {
+			//maybe the file itself is a group!
+			groups_to_reimport.insert(p_files[i]);
+			//groups do not belong to grups
+			group_file = String();
+		} else if (group_file != String()) {
+			//it's a group file, add group to import and skip this file
+			groups_to_reimport.insert(group_file);
+		} else {
+			//it's a regular file
+			ImportFile ifile;
+			ifile.path = p_files[i];
+			ifile.order = ResourceFormatImporter::get_singleton()->get_import_order(p_files[i]);
+			files.push_back(ifile);
+		}
+
+		//group may have changed, so also update group reference
+		EditorFileSystemDirectory *fs = NULL;
+		int cpos = -1;
+		if (_find_file(p_files[i], &fs, cpos)) {
+
+			fs->files.write[cpos]->import_group_file = group_file;
+		}
 	}
 
 	files.sort();
 
 	for (int i = 0; i < files.size(); i++) {
 		pr.step(files[i].path.get_file(), i);
-
 		_reimport_file(files[i].path);
 	}
 
+	//reimport groups
+
+	if (groups_to_reimport.size()) {
+		Map<String, Vector<String> > group_files;
+		_find_group_files(filesystem, group_files, groups_to_reimport);
+		for (Map<String, Vector<String> >::Element *E = group_files.front(); E; E = E->next()) {
+
+			Error err = _reimport_group(E->key(), E->get());
+			if (err == OK) {
+				_reimport_file(E->key());
+			}
+		}
+	}
+
 	_save_filesystem_cache();
 	importing = false;
 	if (!is_scanning()) {
@@ -1793,6 +2021,63 @@ Error EditorFileSystem::_resource_import(const String &p_path) {
 	return OK;
 }
 
+bool EditorFileSystem::is_group_file(const String &p_path) const {
+	return group_file_cache.has(p_path);
+}
+
+void EditorFileSystem::_move_group_files(EditorFileSystemDirectory *efd, const String &p_group_file, const String &p_new_location) {
+
+	int fc = efd->files.size();
+	EditorFileSystemDirectory::FileInfo *const *files = efd->files.ptrw();
+	for (int i = 0; i < fc; i++) {
+
+		if (files[i]->import_group_file == p_group_file) {
+
+			files[i]->import_group_file = p_new_location;
+
+			Ref<ConfigFile> config;
+			config.instance();
+			String path = efd->get_file_path(i) + ".import";
+			Error err = config->load(path);
+			if (err != OK) {
+				continue;
+			}
+			if (config->has_section_key("remap", "group_file")) {
+
+				config->set_value("remap", "group_file", p_new_location);
+			}
+
+			List<String> sk;
+			config->get_section_keys("params", &sk);
+			for (List<String>::Element *E = sk.front(); E; E = E->next()) {
+				//not very clean, but should work
+				String param = E->get();
+				String value = config->get_value("params", param);
+				if (value == p_group_file) {
+					config->set_value("params", param, p_new_location);
+				}
+			}
+
+			config->save(path);
+		}
+	}
+
+	for (int i = 0; i < efd->get_subdir_count(); i++) {
+		_move_group_files(efd->get_subdir(i), p_group_file, p_new_location);
+	}
+}
+
+void EditorFileSystem::move_group_file(const String &p_path, const String &p_new_path) {
+
+	if (get_filesystem()) {
+		_move_group_files(get_filesystem(), p_path, p_new_path);
+		if (group_file_cache.has(p_path)) {
+			group_file_cache.erase(p_path);
+			group_file_cache.insert(p_new_path);
+		}
+	}
+}
+
 void EditorFileSystem::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("get_filesystem"), &EditorFileSystem::get_filesystem);
diff --git a/editor/editor_file_system.h b/editor/editor_file_system.h
index 2a9e325454..8943706202 100644
--- a/editor/editor_file_system.h
+++ b/editor/editor_file_system.h
@@ -56,6 +56,7 @@ class EditorFileSystemDirectory : public Object {
 		uint64_t modified_time;
 		uint64_t import_modified_time;
 		bool import_valid;
+		String import_group_file;
 		Vector<String> deps;
 		bool verified; //used for checking changes
 		String script_class_name;
@@ -167,6 +168,7 @@ class EditorFileSystem : public Node {
 		uint64_t import_modification_time;
 		Vector<String> deps;
 		bool import_valid;
+		String import_group_file;
 		String script_class_name;
 		String script_class_extends;
 		String script_class_icon_path;
@@ -211,6 +213,7 @@ class EditorFileSystem : public Node {
 	void _update_extensions();
 
 	void _reimport_file(const String &p_file);
+	Error _reimport_group(const String &p_group_file, const Vector<String> &p_files);
 
 	bool _test_for_reimport(const String &p_path, bool p_only_imported_files);
 
@@ -236,6 +239,12 @@ class EditorFileSystem : public Node {
 
 	bool using_fat_32; //workaround for projects in FAT32 filesystem (pendrives, most of the time)
 
+	void _find_group_files(EditorFileSystemDirectory *efd, Map<String, Vector<String> > &group_files, Set<String> &groups_to_reimport);
+
+	void _move_group_files(EditorFileSystemDirectory *efd, const String &p_group_file, const String &p_new_location);
+
+	Set<String> group_file_cache;
+
 protected:
 	void _notification(int p_what);
 	static void _bind_methods();
@@ -260,6 +269,9 @@ public:
 
 	void update_script_classes();
 
+	bool is_group_file(const String &p_path) const;
+	void move_group_file(const String &p_path, const String &p_new_path);
+
 	EditorFileSystem();
 	~EditorFileSystem();
 };
diff --git a/editor/editor_inspector.cpp b/editor/editor_inspector.cpp
index c705f9af2b..f1f68a14de 100644
--- a/editor/editor_inspector.cpp
+++ b/editor/editor_inspector.cpp
@@ -470,10 +470,12 @@ bool EditorPropertyRevert::can_property_revert(Object *p_object, const StringNam
 
 	if (!has_revert && !p_object->get_script().is_null()) {
 		Ref<Script> scr = p_object->get_script();
-		Variant orig_value;
-		if (scr->get_property_default_value(p_property, orig_value)) {
-			if (orig_value != p_object->get(p_property)) {
-				has_revert = true;
+		if (scr.is_valid()) {
+			Variant orig_value;
+			if (scr->get_property_default_value(p_property, orig_value)) {
+				if (orig_value != p_object->get(p_property)) {
+					has_revert = true;
+				}
 			}
 		}
 	}
@@ -668,11 +670,13 @@ void EditorProperty::_gui_input(const Ref<InputEvent> &p_event) {
 
 			if (!object->get_script().is_null()) {
 				Ref<Script> scr = object->get_script();
-				Variant orig_value;
-				if (scr->get_property_default_value(property, orig_value)) {
-					emit_changed(property, orig_value);
-					update_property();
-					return;
+				if (scr.is_valid()) {
+					Variant orig_value;
+					if (scr->get_property_default_value(property, orig_value)) {
+						emit_changed(property, orig_value);
+						update_property();
+						return;
+					}
 				}
 			}
 
@@ -1523,7 +1527,7 @@ void EditorInspector::update_tree() {
 					if (E) {
 						descr = E->get().brief_description;
 					}
-					class_descr_cache[type2] = descr.word_wrap(80);
+					class_descr_cache[type2] = descr;
 				}
 
 				category->set_tooltip(p.name + "::" + (class_descr_cache[type2] == "" ? "" : class_descr_cache[type2]));
@@ -1675,7 +1679,7 @@ void EditorInspector::update_tree() {
 				while (F && descr == String()) {
 					for (int i = 0; i < F->get().properties.size(); i++) {
 						if (F->get().properties[i].name == propname.operator String()) {
-							descr = F->get().properties[i].description.strip_edges().word_wrap(80);
+							descr = F->get().properties[i].description.strip_edges();
 							break;
 						}
 					}
diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index 8a67002503..b729de2e2f 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -65,6 +65,7 @@
 #include "editor/import/resource_importer_obj.h"
 #include "editor/import/resource_importer_scene.h"
 #include "editor/import/resource_importer_texture.h"
+#include "editor/import/resource_importer_texture_atlas.h"
 #include "editor/import/resource_importer_wav.h"
 #include "editor/plugins/animation_blend_space_1d_editor.h"
 #include "editor/plugins/animation_blend_space_2d_editor.h"
@@ -1306,6 +1307,7 @@ void EditorNode::_dialog_action(String p_file) {
 				_save_default_environment();
 				_save_scene_with_preview(p_file, scene_idx);
 				_add_to_recent_scenes(p_file);
+				save_layout();
 
 				if (scene_idx != -1)
 					_discard_changes();
@@ -4069,6 +4071,7 @@ void EditorNode::_load_open_scenes_from_config(Ref<ConfigFile> p_layout, const S
 	for (int i = 0; i < scenes.size(); i++) {
 		load_scene(scenes[i]);
 	}
+	save_layout();
 
 	restoring_scenes = false;
 }
@@ -5119,6 +5122,10 @@ EditorNode::EditorNode() {
 		import_image.instance();
 		ResourceFormatImporter::get_singleton()->add_importer(import_image);
 
+		Ref<ResourceImporterTextureAtlas> import_texture_atlas;
+		import_texture_atlas.instance();
+		ResourceFormatImporter::get_singleton()->add_importer(import_texture_atlas);
+
 		Ref<ResourceImporterCSVTranslation> import_csv_translation;
 		import_csv_translation.instance();
 		ResourceFormatImporter::get_singleton()->add_importer(import_csv_translation);
diff --git a/editor/editor_properties.cpp b/editor/editor_properties.cpp
index 31f53305e2..9d936d9b99 100644
--- a/editor/editor_properties.cpp
+++ b/editor/editor_properties.cpp
@@ -2993,13 +2993,17 @@ bool EditorInspectorDefaultPlugin::parse_property(Object *p_object, Variant::Typ
 				EditorPropertyClassName *editor = memnew(EditorPropertyClassName);
 				editor->setup("Object", p_hint_text);
 				add_property_editor(p_path, editor);
-			} else if (p_hint == PROPERTY_HINT_DIR || p_hint == PROPERTY_HINT_FILE || p_hint == PROPERTY_HINT_GLOBAL_DIR || p_hint == PROPERTY_HINT_GLOBAL_FILE) {
+			} else if (p_hint == PROPERTY_HINT_DIR || p_hint == PROPERTY_HINT_FILE || p_hint == PROPERTY_HINT_SAVE_FILE || p_hint == PROPERTY_HINT_GLOBAL_DIR || p_hint == PROPERTY_HINT_GLOBAL_FILE) {
 
 				Vector<String> extensions = p_hint_text.split(",");
 				bool global = p_hint == PROPERTY_HINT_GLOBAL_DIR || p_hint == PROPERTY_HINT_GLOBAL_FILE;
 				bool folder = p_hint == PROPERTY_HINT_DIR || p_hint == PROPERTY_HINT_GLOBAL_DIR;
+				bool save = p_hint == PROPERTY_HINT_SAVE_FILE;
 				EditorPropertyPath *editor = memnew(EditorPropertyPath);
 				editor->setup(extensions, folder, global);
+				if (save) {
+					editor->set_save_mode();
+				}
 				add_property_editor(p_path, editor);
 			} else if (p_hint == PROPERTY_HINT_METHOD_OF_VARIANT_TYPE ||
 					   p_hint == PROPERTY_HINT_METHOD_OF_BASE_TYPE ||
diff --git a/editor/filesystem_dock.cpp b/editor/filesystem_dock.cpp
index 5a1383be6d..aade606412 100644
--- a/editor/filesystem_dock.cpp
+++ b/editor/filesystem_dock.cpp
@@ -1021,6 +1021,7 @@ void FileSystemDock::_try_move_item(const FileOrFolder &p_item, const String &p_
 				for (int j = 0; j < ed->get_edited_scene_count(); j++) {
 					if (ed->get_scene_path(j) == file_changed_paths[i]) {
 						ed->get_edited_scene_root(j)->set_filename(new_item_path);
+						editor->save_layout();
 						break;
 					}
 				}
@@ -1256,6 +1257,10 @@ void FileSystemDock::_rename_operation_confirm() {
 		return;
 	}
 
+	if (EditorFileSystem::get_singleton()->is_group_file(old_path)) {
+		EditorFileSystem::get_singleton()->move_group_file(old_path, new_path);
+	}
+
 	//Present a more user friendly warning for name conflict
 	DirAccess *da = DirAccess::create(DirAccess::ACCESS_RESOURCES);
 #if defined(WINDOWS_ENABLED) || defined(UWP_ENABLED)
@@ -1353,6 +1358,16 @@ void FileSystemDock::_move_operation_confirm(const String &p_to_path, bool overw
 		}
 	}
 
+	//check groups
+	for (int i = 0; i < to_move.size(); i++) {
+
+		print_line("is group: " + to_move[i].path + ": " + itos(EditorFileSystem::get_singleton()->is_group_file(to_move[i].path)));
+		if (to_move[i].is_file && EditorFileSystem::get_singleton()->is_group_file(to_move[i].path)) {
+			print_line("move to: " + p_to_path.plus_file(to_move[i].path.get_file()));
+			EditorFileSystem::get_singleton()->move_group_file(to_move[i].path, p_to_path.plus_file(to_move[i].path.get_file()));
+		}
+	}
+
 	Map<String, String> file_renames;
 	Map<String, String> folder_renames;
 	bool is_moved = false;
diff --git a/editor/import/atlas_import_failed.xpm b/editor/import/atlas_import_failed.xpm
new file mode 100644
index 0000000000..52db6b76a6
--- /dev/null
+++ b/editor/import/atlas_import_failed.xpm
@@ -0,0 +1,414 @@
+/* XPM */
+static const char * atlas_import_failed_xpm[] = {
+"128 128 283 2",
+"  	c None",
+". 	c #FFFFFF",
+"+ 	c #FFDADA",
+"@ 	c #FF0000",
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+"% 	c #FF2E2E",
+"& 	c #FFD4D4",
+"* 	c #FFD6D6",
+"= 	c #FFE3E3",
+"- 	c #FFB3B3",
+"; 	c #FFC8C8",
+"> 	c #FF3535",
+", 	c #FF8D8D",
+"' 	c #FF7878",
+") 	c #FF6E6E",
+"! 	c #FFB5B5",
+"~ 	c #FF0D0D",
+"{ 	c #FFF0F0",
+"] 	c #FFE8E8",
+"^ 	c #FFC2C2",
+"/ 	c #FFEDED",
+"( 	c #FFBBBB",
+"_ 	c #FFB9B9",
+": 	c #FFA4A4",
+"< 	c #FFFEFE",
+"[ 	c #FFD9D9",
+"} 	c #FF9393",
+"| 	c #FF5858",
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+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . + @ # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . $ % @ & . . . . . * @ + . . . . + @ # . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . * @ + . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . ; @ > , . . . . . * @ + . . . . + @ # . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . * @ + . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . ' ) ! ~ { . . . . * @ + . . . . + @ # . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . * @ + . . . . . . . . . . . . . ",
+". . . . . . . . . . . . ] @ ^ / @ ( . . . _ @ @ @ @ @ : . + @ # . . < [ } | 1 2 3 . . . . 4 5 ) 6 | 7 8 . . . . . . . . = @ - . . 9 @ 0 a b > c d . e , f | g . . . . 9 @ 0 a h % i & . . . . j k l m n o j . . . 9 @ 0 p q m r @ @ @ @ @ : . . . . . . . . . . ",
+". . . . . . . . . . . . k s t . u v < . . _ @ @ @ @ @ : . + @ # . . w @ @ @ @ @ @ 5 . . . k @ @ @ @ @ % . . . . . . . . = @ - . . 9 @ x @ @ @ @ y d z @ @ @ @ * . . . 9 @ A @ @ @ @ @ B . . C D @ @ @ @ @ h C . . 9 @ x @ @ @ E @ @ @ @ @ : . . . . . . . . . . ",
+". . . . . . . . . . . F G 7 . . H @ I . . . * @ + . . . . + @ # . . ] J 8 j K 0 h 6 K . . l l = F j L M . . . . . . . . = @ - . . 9 @ % N j O J @ P Q R S & T U . . . 9 @ s ^ O j V W X F . Y @ Z ` S w  .@ ... . 9 @ s +.t . . * @ + . . . . . . . . . . . . . ",
+". . . . . . . . . . . @.@ #.. . K 6 x . . . * @ + . . . . + @ # . . . . . . . . # @ $.. . ' M . . . . . . . . . . . . . = @ - . . 9 @ %.. . . &.@ *.4 . . . =.r . . . 9 @ -.. . . . ;.@ 0 . q 6 t . . . t f h . . 9 @ >.. . . . * @ + . . . . . . . . . . . . . ",
+". . . . . . . . . . . ,.'.).. . . !.~.j . . * @ + . . . . + @ # . . . {.].P ~ @ @ @ 9 . . 8 r ^.- /.j . . . . . . . . . = @ - . . 9 @ + . . . . @ A . . . . !.~ . . . 9 @ (.. . . . # @ N . 1 _.. . . . . c s . . 9 @ (.. . . . * @ + . . . . . . . . . . . . . ",
+". . . . . . . . . . { ~ @ @ @ @ @ @ @ :.. . * @ + . . . . + @ # . . ^ @ @ @ @ @ @ @ H . . . F <._ [.> }.. . . . . . . . = @ - . . 9 @ 0 . . . . @ |.. . . . : @ . . . 9 @ (.. . . . # @ N . 1 u . . . . . c s . . 9 @ 0 . . . . * @ + . . . . . . . . . . . . . ",
+". . . . . . . . . . 1.@ @ @ @ @ @ @ @ ^.. . #.@ # . . . . + @ # . . 2.r $.$ < . [ @ H . . . . . . . + @ * . . . . . . . = @ - . . 9 @ 0 . . . . @ |.. . . . : @ . . . 9 @ -.. . . . ;.@ 0 . q 6 t . . . O f h . . 9 @ 0 . . . . #.@ # . . . . . . . . . . . . . ",
+". . . . . . . . . < 3.4.K . . . . . 5.@ w . 6.@ ;.F . . . + @ # . . 2.n ` 4 $ + *.@ H . 4 7.@.8.4 9.k @ ^ . . . . . . . = @ - . . 9 @ 0 . . . . @ |.. . . . : @ . . . 9 @ s ^ O j V W X F . %.@ u w F ] u @ - . . 9 @ 0 . . . . 6.@ ;.F . . . . . . . . . . . . ",
+". . . . . . . . . L @ 0.. . . . . . L @ o . K > @ @ @ : . + @ # . . a.@ @ @ @ @ b.@ H . F @ @ @ @ @ @ > / . . . . . . . = @ - . . 9 @ 0 . . . . @ |.. . . . : @ . . . 9 @ A @ @ @ @ @ B . . C D @ @ @ @ @ h $ . . 9 @ 0 . . . . K > @ @ @ : . . . . . . . . . . ",
+". . . . . . . . . A @ ` . . . . . . < *.c.F . # ^.~.@ : . + @ # . . 4 _ *.% q N d.@ H . . e.: h % l b.e . . . . . . . . = @ - . . 9 @ 0 . . . . @ |.. . . . : @ . . . 9 @ 0 f.g.~.i /.. . . . j h.n W i.>.O . . . 9 @ 0 . . . . . # ^.~.@ : . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 @ 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 @ 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 @ 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 @ 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . + @ # . . + @ # . . . . . . . . . . . . . . . . . . . . j.k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ @ @ @ @ @ @ # . . . . . . . . . . + @ # . . + @ # . . . . . . . . . . . . . . . . . . . . j.k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ @ @ @ @ @ @ # . . . . . . . . . . . . . . . + @ # . . . . . . . . . . . . . . . . . . . . j.k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . . . . . . . . . . . . . . . . . + @ # . . . . . . . . . . . . . . . . . . . . j.k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . < [ } | 1 2 3 . . . . + @ # . . + @ # . . . 4 l.m.% G 5.n.. . . . &.Q z c.x O j.k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . w @ @ @ @ @ @ 5 . . . + @ # . . + @ # . . ).o.@ @ @ @ @ c./ . . $ v @ @ @ @ p.2.k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ @ @ @ @ @ U ] J 8 j K 0 h 6 K . . + @ # . . + @ # . . q.@ } w F O q.s r.. . a.@ s.d S 8 ) @ k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ @ @ @ @ @ U . . . . . . # @ $.. . + @ # . . + @ # . . t.| ).. . . . !.> < . q G C . . . d @ k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . . {.].P ~ @ @ @ 9 . . + @ # . . + @ # . . > @ @ @ @ @ @ @ @ O . % u.. . . . . y k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . ^ @ @ @ @ @ @ @ H . . + @ # . . + @ # . . 1 @ @ @ @ @ @ @ @ v.. % u.. . . . . r k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . 2.r $.$ < . [ @ H . . + @ # . . + @ # . . ^.h < . . . . . . . . q G C . . . d @ k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . 2.n ` 4 $ + *.@ H . . + @ # . . + @ # . . +.@ w.e.C S d x.y.. . a.@ s.z.S 8 ) @ k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . a.@ @ @ @ @ b.@ H . . + @ # . . + @ # . . ).M @ @ @ @ @ @ s.. . $ v @ @ @ @ ^.2.k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = @ - . . . . . 4 _ *.% q N d.@ H . . + @ # . . + @ # . . . ).f.k.6 z ' Y v.. . . &.A A.z A O j.k.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.D.B.C.D.B.C.D.. . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E.C.C.C.C.F.. B.C.D.B.C.D.B.C.D.. . . . C.G.. . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E.C.H.. . . . . . . B.C.D.B.C.D.. . . . C.G.. . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E.C.H.. . . . B.C.D.B.C.D.B.C.D.. . . I.C.C.C.J.B.C.C.C.K.L.M.. N.O.P.Q.R.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E.C.C.C.C.H.. B.C.D.B.C.D.B.C.D.. . . . C.G.. . B.C.S.T.U.C.V.W.C.X.Y.Z.`.E.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E.C.H.. . . . B.C.D.B.C.D.B.C.D.. . . . C.G.. . B.C. +. .+C.++@+C.C.C.C.C.R.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E.C.H.. . . . B.C.D.B.C.D.B.C.D.. . . . #+Q.$+. B.C.D.. .+C.++W.C.%+&+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E.C.H.. . . . B.C.D.B.C.D.B.C.D.. . . . *+`.C.=+B.C.D.. .+C.++. N.-+;+C.C.Y.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . B.C.D.B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Y.C.>+,+R.. . '+C.C.)+. . . C.G.. . B.C.D.. . . . . . . . . . . . . . . . E.C.C.C.C.F.. B.C.D.B.C.D.. . . . . . . Y.C.>+,+R.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Y.C.>+,+R.. . !+~+{+]+. . . C.G.. . B.C.D.. . . . . . . . . . . . . . . . E.C.H.. . . . . . . B.C.D.. . . . . . . Y.C.>+,+R.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Y.C.>+,+R.. ^+C./+(+_+&+. I.C.C.C.J.B.C.D.:+C.C.P.<+[+. }+G.|+C.C.>+. . . E.C.H.. . . . B.C.D.B.C.D.. N.O.P.Q.R.. Y.C.>+,+R.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1+;+T.2+C.3+. . C.G.. . B.C.D.. . . T.4+Q.. 5+C.X.6+Y.. . . . E.C.C.C.C.H.. B.C.D.B.C.D.W.C.X.Y.Z.`.E.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7+8+C.C.C.C.9+. . C.G.. . B.C.D.0+a+8+C.C.|+. b+c+C.C.d+e+. . . E.C.H.. . . . B.C.D.B.C.D.@+C.C.C.C.C.R.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . f+C.g+. . J.h+>+. #+Q.$+. B.C.D.i+C.j+0+,+#+. . &+e+k+C.l+. . . E.C.H.. . . . B.C.D.B.C.D.W.C.%+&+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . m+h+n+. . o+C.p+. *+`.C.=+B.C.D.q+!+{+C.C.#+. =+C.C.8+r+E.. . . E.C.H.. . . . B.C.D.B.C.D.. N.-+;+C.C.Y.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V.4+C.s+C.U.. . . . . . . B.C.D.. . . . N.C.W.. . . B.C.D.. . . . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . t+u+Y.v+C.U.. . . . . . . B.C.D.. . . . N.C.W.. . . B.C.D.. . . . . . . . . . . C.G.. . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . u+w+. . . . . . . . . . . B.C.D.. . . . N.C.W.. . . . . . . . . . . . . . . . . C.G.. . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H.C.C.C.C.C.U.. N.O.P.Q.R.. B.C.D.. x+d+C.C.C.W.. . . B.C.D.B.C.C.C.K.L.M.. . . I.C.C.C.J.B.C.C.C.K.L.M.. N.O.P.Q.R.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . y+!+. v+C.U.W.C.X.Y.Z.`.E.B.C.D.2+C.x+z+(+C.W.. . . B.C.D.B.C.S.T.U.C.V.. . . . C.G.. . B.C.S.T.U.C.V.W.C.X.Y.Z.`.E.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . y+!+. v+C.U.@+C.C.C.C.C.R.B.C.D.%+C.A+. B+C.W.. . . B.C.D.B.C. +. .+C.++. . . . C.G.. . B.C. +. .+C.++@+C.C.C.C.C.R.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . y+!+. v+C.U.W.C.%+&+. . . B.C.D.2+C.k+z+9+C.W.. . . B.C.D.B.C.D.. .+C.++. . . . #+Q.$+. B.C.D.. .+C.++W.C.%+&+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . y+!+. v+C.U.. N.-+;+C.C.Y.B.C.D.. x+d+C.C.C.W.. . . B.C.D.B.C.D.. .+C.++. . . . *+`.C.=+B.C.D.. .+C.++. N.-+;+C.C.Y.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N.C.W.. . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . N.C.W.. . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C.G.. . . . . . . . . N.C.W.. . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . N.C.W.. . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C.G.. . . . . . . . . N.C.W.. . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . N.C.W.. . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . B.C.D.)+C.C.C.K.C+O.K.!+B.B.C.C.C.D+E+7+. '+O.P.C+F+. B.C.C.C.,+I.C.C.C.J.. . . . x+d+C.C.C.W.. '+O.P.C+F+. . .+G+H+C.R.B.C.D.>+I+I.q+. . . :+C.C.P.<+[+. B.C.C.C.K.L.M.. x+d+C.C.C.W.. . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . B.C.D.)+C.!+T.J+C.=+g+C.]+B.C.I+E.=+C.K+W.C.]+Y.L+h+b+B.C.O.M+. . C.G.. . . . . 2+C.x+z+(+C.W.W.C.]+Y.L+h+b+N+C.O+z+. . B.C.P+4+Q+T.. . . . . . . T.4+Q.. B.C.S.T.U.C.V.2+C.x+z+(+C.W.. . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . B.C.D.)+C. +. R+C.M+S+C.T+B.C.U+. M+C.E+@+C.V.. =+C.V+B.C. +. . . C.G.. . . . . %+C.A+. B+C.W.@+C.V.. =+C.V+@+C.A+. . . B.C.C.C.R.. . . . . 0+a+8+C.C.|+. B.C. +. .+C.++%+C.A+. B+C.W.. . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . B.C.D.)+C.D.. R+C.>+S+C.T+B.C.C+E.W+C.K+W.C.*+Y.X+{+b+B.C.D.. . . #+Q.$+. . . . 2+C.k+z+9+C.W.W.C.*+Y.X+{+b+Y+C.s+z+. . B.C.Z+m+|+V.. . . . i+C.j+0+,+#+. B.C.D.. .+C.++2+C.k+z+9+C.W.. . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . B.C.D.)+C.D.. R+C.>+S+C.T+B.C.C.C.D+`+7+.  @.@D+G++@. B.C.D.. . . *+`.C.=+. . . . x+d+C.C.C.W..  @.@D+G++@. . l+@@H+C.R.B.C.D.Y.#@K.2+. . . q+!+{+C.C.#+. B.C.D.. .+C.++. x+d+C.C.C.W.. . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C.G.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C.G.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.C.C.,+. N.O.P.Q.R.. . . . . B.C.D.)+C.C.C.K.C+O.K.!+B.B.C.C.C.D+E+7+. '+O.P.C+F+. B.C.C.C.,+I.C.C.C.J.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.O.M+. W.C.X.Y.Z.`.E.$@C.C.%@B.C.D.)+C.!+T.J+C.=+g+C.]+B.C.I+E.=+C.K+W.C.]+Y.L+h+b+B.C.O.M+. . C.G.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C. +. . @+C.C.C.C.C.R.. . . . B.C.D.)+C. +. R+C.M+S+C.T+B.C.U+. M+C.E+@+C.V.. =+C.V+B.C. +. . . C.G.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.D.. . W.C.%+&+. . . . . . . B.C.D.)+C.D.. R+C.>+S+C.T+B.C.C+E.W+C.K+W.C.*+Y.X+{+b+B.C.D.. . . #+Q.$+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.D.. . . N.-+;+C.C.Y.. . . . B.C.D.)+C.D.. R+C.>+S+C.T+B.C.C.C.D+`+7+.  @.@D+G++@. B.C.D.. . . *+`.C.=+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.C.D.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ",
+". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "};
diff --git a/editor/import/resource_importer_texture_atlas.cpp b/editor/import/resource_importer_texture_atlas.cpp
new file mode 100644
index 0000000000..35fdd32e2c
--- /dev/null
+++ b/editor/import/resource_importer_texture_atlas.cpp
@@ -0,0 +1,382 @@
+#include "resource_importer_texture_atlas.h"
+
+#include "atlas_import_failed.xpm"
+#include "core/io/image_loader.h"
+#include "core/io/resource_saver.h"
+#include "core/os/file_access.h"
+#include "editor/editor_atlas_packer.h"
+#include "scene/resources/mesh.h"
+#include "scene/resources/texture.h"
+
+String ResourceImporterTextureAtlas::get_importer_name() const {
+
+	return "texture_atlas";
+}
+
+String ResourceImporterTextureAtlas::get_visible_name() const {
+
+	return "TextureAtlas";
+}
+void ResourceImporterTextureAtlas::get_recognized_extensions(List<String> *p_extensions) const {
+
+	ImageLoader::get_recognized_extensions(p_extensions);
+}
+
+String ResourceImporterTextureAtlas::get_save_extension() const {
+	return "res";
+}
+
+String ResourceImporterTextureAtlas::get_resource_type() const {
+
+	return "Texture";
+}
+
+bool ResourceImporterTextureAtlas::get_option_visibility(const String &p_option, const Map<StringName, Variant> &p_options) const {
+
+	return true;
+}
+
+int ResourceImporterTextureAtlas::get_preset_count() const {
+	return 0;
+}
+String ResourceImporterTextureAtlas::get_preset_name(int p_idx) const {
+
+	return String();
+}
+
+void ResourceImporterTextureAtlas::get_import_options(List<ImportOption> *r_options, int p_preset) const {
+
+	r_options->push_back(ImportOption(PropertyInfo(Variant::STRING, "atlas_file", PROPERTY_HINT_SAVE_FILE, "*.png"), ""));
+	r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "import_mode", PROPERTY_HINT_ENUM, "Region,Mesh2D"), 0));
+}
+
+String ResourceImporterTextureAtlas::get_option_group_file() const {
+	return "atlas_file";
+}
+
+Error ResourceImporterTextureAtlas::import(const String &p_source_file, const String &p_save_path, const Map<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files, Variant *r_metadata) {
+
+	/* If this happens, it's because the atlas_file field was not filled, so just import a broken texture */
+
+	//use an xpm because it's size independent, the editor images are vector and size dependent
+	//it's a simple hack
+	Ref<Image> broken = memnew(Image((const char **)atlas_import_failed_xpm));
+	Ref<ImageTexture> broken_texture;
+	broken_texture.instance();
+	broken_texture->create_from_image(broken);
+
+	String target_file = p_save_path + ".tex";
+
+	ResourceSaver::save(target_file, broken_texture);
+
+	return OK;
+}
+
+static void _plot_triangle(Vector2 *vertices, const Vector2 &p_offset, bool p_transposed, Ref<Image> p_image, const Ref<Image> &p_src_image) {
+
+	int width = p_image->get_width();
+	int height = p_image->get_height();
+	int src_width = p_src_image->get_width();
+	int src_height = p_src_image->get_height();
+
+	int x[3];
+	int y[3];
+
+	for (int j = 0; j < 3; j++) {
+
+		x[j] = vertices[j].x;
+		y[j] = vertices[j].y;
+	}
+
+	// sort the points vertically
+	if (y[1] > y[2]) {
+		SWAP(x[1], x[2]);
+		SWAP(y[1], y[2]);
+	}
+	if (y[0] > y[1]) {
+		SWAP(x[0], x[1]);
+		SWAP(y[0], y[1]);
+	}
+	if (y[1] > y[2]) {
+		SWAP(x[1], x[2]);
+		SWAP(y[1], y[2]);
+	}
+
+	double dx_far = double(x[2] - x[0]) / (y[2] - y[0] + 1);
+	double dx_upper = double(x[1] - x[0]) / (y[1] - y[0] + 1);
+	double dx_low = double(x[2] - x[1]) / (y[2] - y[1] + 1);
+	double xf = x[0];
+	double xt = x[0] + dx_upper; // if y[0] == y[1], special case
+	for (int yi = y[0]; yi <= (y[2] > height - 1 ? height - 1 : y[2]); yi++) {
+		if (yi >= 0) {
+			for (int xi = (xf > 0 ? int(xf) : 0); xi <= (xt < width ? xt : width - 1); xi++) {
+
+				int px = xi, py = yi;
+				int sx = px, sy = py;
+				sx = CLAMP(sx, 0, src_width);
+				sy = CLAMP(sy, 0, src_height);
+				Color color = p_src_image->get_pixel(sx, sy);
+				if (p_transposed) {
+					SWAP(px, py);
+				}
+				px += p_offset.x;
+				py += p_offset.y;
+
+				//may have been cropped, so don't blit what is not visible?
+				if (px < 0 || px >= width) {
+					continue;
+				}
+				if (py < 0 || py >= height) {
+					continue;
+				}
+				p_image->set_pixel(px, py, color);
+			}
+
+			for (int xi = (xf < width ? int(xf) : width - 1); xi >= (xt > 0 ? xt : 0); xi--) {
+				int px = xi, py = yi;
+				int sx = px, sy = py;
+				sx = CLAMP(sx, 0, src_width);
+				sy = CLAMP(sy, 0, src_height);
+				Color color = p_src_image->get_pixel(sx, sy);
+				if (p_transposed) {
+					SWAP(px, py);
+				}
+				px += p_offset.x;
+				py += p_offset.y;
+
+				//may have been cropped, so don't blit what is not visible?
+				if (px < 0 || px >= width) {
+					continue;
+				}
+				if (py < 0 || py >= height) {
+					continue;
+				}
+				p_image->set_pixel(px, py, color);
+			}
+		}
+		xf += dx_far;
+		if (yi < y[1])
+			xt += dx_upper;
+		else
+			xt += dx_low;
+	}
+}
+
+Error ResourceImporterTextureAtlas::import_group_file(const String &p_group_file, const Map<String, Map<StringName, Variant> > &p_source_file_options, const Map<String, String> &p_base_paths) {
+
+	ERR_FAIL_COND_V(p_source_file_options.size() == 0, ERR_BUG); //should never happen
+
+	Vector<EditorAtlasPacker::Chart> charts;
+	Vector<PackData> pack_data_files;
+
+	pack_data_files.resize(p_source_file_options.size());
+
+	int idx = 0;
+	for (const Map<String, Map<StringName, Variant> >::Element *E = p_source_file_options.front(); E; E = E->next(), idx++) {
+
+		PackData &pack_data = pack_data_files.write[idx];
+		String source = E->key();
+		const Map<StringName, Variant> &options = E->get();
+
+		Ref<Image> image;
+		image.instance();
+		Error err = ImageLoader::load_image(source, image);
+		ERR_CONTINUE(err != OK);
+
+		pack_data.image = image;
+
+		int mode = options["import_mode"];
+
+		if (mode == IMPORT_MODE_REGION) {
+
+			pack_data.is_mesh = false;
+
+			EditorAtlasPacker::Chart chart;
+
+			//clip a region from the image
+			Rect2 used_rect = image->get_used_rect();
+			pack_data.region = used_rect;
+
+			chart.vertices.push_back(used_rect.position);
+			chart.vertices.push_back(used_rect.position + Vector2(used_rect.size.x, 0));
+			chart.vertices.push_back(used_rect.position + Vector2(used_rect.size.x, used_rect.size.y));
+			chart.vertices.push_back(used_rect.position + Vector2(0, used_rect.size.y));
+			EditorAtlasPacker::Chart::Face f;
+			f.vertex[0] = 0;
+			f.vertex[1] = 1;
+			f.vertex[2] = 2;
+			chart.faces.push_back(f);
+			f.vertex[0] = 0;
+			f.vertex[1] = 2;
+			f.vertex[2] = 3;
+			chart.faces.push_back(f);
+			chart.can_transpose = false;
+			pack_data.chart_vertices.push_back(chart.vertices);
+			pack_data.chart_pieces.push_back(charts.size());
+			charts.push_back(chart);
+
+		} else {
+			pack_data.is_mesh = true;
+
+			Ref<BitMap> bit_map;
+			bit_map.instance();
+			bit_map->create_from_image_alpha(image);
+			Vector<Vector<Vector2> > polygons = bit_map->clip_opaque_to_polygons(Rect2(0, 0, image->get_width(), image->get_height()));
+
+			for (int j = 0; j < polygons.size(); j++) {
+
+				EditorAtlasPacker::Chart chart;
+				chart.vertices = polygons[j];
+				chart.can_transpose = true;
+
+				Vector<int> poly = Geometry::triangulate_polygon(polygons[j]);
+				for (int i = 0; i < poly.size(); i += 3) {
+
+					EditorAtlasPacker::Chart::Face f;
+					f.vertex[0] = poly[i + 0];
+					f.vertex[1] = poly[i + 1];
+					f.vertex[2] = poly[i + 2];
+					chart.faces.push_back(f);
+				}
+
+				pack_data.chart_pieces.push_back(charts.size());
+				charts.push_back(chart);
+
+				pack_data.chart_vertices.push_back(polygons[j]);
+			}
+		}
+	}
+
+	//pack the charts
+	int atlas_width, atlas_height;
+	EditorAtlasPacker::chart_pack(charts, atlas_width, atlas_height);
+
+	//blit the atlas
+	Ref<Image> new_atlas;
+	new_atlas.instance();
+	new_atlas->create(atlas_width, atlas_height, false, Image::FORMAT_RGBA8);
+
+	new_atlas->lock();
+
+	for (int i = 0; i < pack_data_files.size(); i++) {
+
+		PackData &pack_data = pack_data_files.write[i];
+		pack_data.image->lock();
+		for (int j = 0; j < pack_data.chart_pieces.size(); j++) {
+			const EditorAtlasPacker::Chart &chart = charts[pack_data.chart_pieces[j]];
+			for (int k = 0; k < chart.faces.size(); k++) {
+				Vector2 positions[3];
+				for (int l = 0; l < 3; l++) {
+					int vertex_idx = chart.faces[k].vertex[l];
+					positions[l] = chart.vertices[vertex_idx];
+				}
+
+				_plot_triangle(positions, chart.final_offset, chart.transposed, new_atlas, pack_data.image);
+			}
+		}
+		pack_data.image->unlock();
+	}
+	new_atlas->unlock();
+
+	//save the atlas
+
+	new_atlas->save_png(p_group_file);
+
+	//update cache if existing, else create
+	Ref<Texture> cache;
+	if (ResourceCache::has(p_group_file)) {
+		Resource *resptr = ResourceCache::get(p_group_file);
+		cache.reference_ptr(resptr);
+	} else {
+		Ref<ImageTexture> res_cache;
+		res_cache.instance();
+		res_cache->create_from_image(new_atlas);
+		res_cache->set_path(p_group_file);
+		cache = res_cache;
+	}
+
+	//save the images
+	idx = 0;
+	for (const Map<String, Map<StringName, Variant> >::Element *E = p_source_file_options.front(); E; E = E->next(), idx++) {
+
+		PackData &pack_data = pack_data_files.write[idx];
+
+		Ref<Texture> texture;
+
+		if (!pack_data.is_mesh) {
+			Vector2 offset = charts[pack_data.chart_pieces[0]].vertices[0] + charts[pack_data.chart_pieces[0]].final_offset;
+
+			//region
+			Ref<AtlasTexture> atlas_texture;
+			atlas_texture.instance();
+			atlas_texture->set_atlas(cache);
+			atlas_texture->set_region(Rect2(offset, pack_data.region.size));
+			atlas_texture->set_margin(Rect2(pack_data.region.position, Size2(pack_data.image->get_width(), pack_data.image->get_height()) - pack_data.region.size));
+
+			texture = atlas_texture;
+		} else {
+			Ref<ArrayMesh> mesh;
+			mesh.instance();
+
+			for (int i = 0; i < pack_data.chart_pieces.size(); i++) {
+				const EditorAtlasPacker::Chart &chart = charts[pack_data.chart_pieces[i]];
+				PoolVector<Vector2> vertices;
+				PoolVector<int> indices;
+				PoolVector<Vector2> uvs;
+				int vc = chart.vertices.size();
+				int fc = chart.faces.size();
+				vertices.resize(vc);
+				uvs.resize(vc);
+				indices.resize(fc * 3);
+
+				{
+					PoolVector<Vector2>::Write vw = vertices.write();
+					PoolVector<int>::Write iw = indices.write();
+					PoolVector<Vector2>::Write uvw = uvs.write();
+
+					for (int j = 0; j < vc; j++) {
+						vw[j] = chart.vertices[j];
+						Vector2 uv = chart.vertices[j];
+						if (chart.transposed) {
+							SWAP(uv.x, uv.y);
+						}
+						uv += chart.final_offset;
+						uv /= new_atlas->get_size(); //normalize uv to 0-1 range
+						uvw[j] = uv;
+					}
+
+					for (int j = 0; j < fc; j++) {
+						iw[j * 3 + 0] = chart.faces[j].vertex[0];
+						iw[j * 3 + 1] = chart.faces[j].vertex[1];
+						iw[j * 3 + 2] = chart.faces[j].vertex[2];
+					}
+				}
+
+				Array arrays;
+				arrays.resize(Mesh::ARRAY_MAX);
+				arrays[Mesh::ARRAY_VERTEX] = vertices;
+				arrays[Mesh::ARRAY_TEX_UV] = uvs;
+				arrays[Mesh::ARRAY_INDEX] = indices;
+
+				mesh->add_surface_from_arrays(Mesh::PRIMITIVE_TRIANGLES, arrays);
+			}
+
+			Ref<MeshTexture> mesh_texture;
+			mesh_texture.instance();
+			mesh_texture->set_base_texture(cache);
+			mesh_texture->set_image_size(pack_data.image->get_size());
+			mesh_texture->set_mesh(mesh);
+
+			texture = mesh_texture;
+			//mesh
+		}
+
+		String save_path = p_base_paths[E->key()] + ".res";
+		ResourceSaver::save(save_path, texture);
+	}
+
+	return OK;
+}
+
+ResourceImporterTextureAtlas::ResourceImporterTextureAtlas() {
+}
diff --git a/editor/import/resource_importer_texture_atlas.h b/editor/import/resource_importer_texture_atlas.h
new file mode 100644
index 0000000000..62be570dc6
--- /dev/null
+++ b/editor/import/resource_importer_texture_atlas.h
@@ -0,0 +1,42 @@
+#ifndef RESOURCE_IMPORTER_TEXTURE_ATLAS_H
+#define RESOURCE_IMPORTER_TEXTURE_ATLAS_H
+
+#include "core/image.h"
+#include "core/io/resource_importer.h"
+class ResourceImporterTextureAtlas : public ResourceImporter {
+	GDCLASS(ResourceImporterTextureAtlas, ResourceImporter)
+
+	struct PackData {
+		Rect2 region;
+		bool is_mesh;
+		Vector<int> chart_pieces; //one for region, many for mesh
+		Vector<Vector<Vector2> > chart_vertices; //for mesh
+		Ref<Image> image;
+	};
+
+public:
+	enum ImportMode {
+		IMPORT_MODE_REGION,
+		IMPORT_MODE_2D_MESH
+	};
+
+	virtual String get_importer_name() const;
+	virtual String get_visible_name() const;
+	virtual void get_recognized_extensions(List<String> *p_extensions) const;
+	virtual String get_save_extension() const;
+	virtual String get_resource_type() const;
+
+	virtual int get_preset_count() const;
+	virtual String get_preset_name(int p_idx) const;
+
+	virtual void get_import_options(List<ImportOption> *r_options, int p_preset = 0) const;
+	virtual bool get_option_visibility(const String &p_option, const Map<StringName, Variant> &p_options) const;
+	virtual String get_option_group_file() const;
+
+	virtual Error import(const String &p_source_file, const String &p_save_path, const Map<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = NULL, Variant *r_metadata = NULL);
+	virtual Error import_group_file(const String &p_group_file, const Map<String, Map<StringName, Variant> > &p_source_file_options, const Map<String, String> &p_base_paths);
+
+	ResourceImporterTextureAtlas();
+};
+
+#endif // RESOURCE_IMPORTER_TEXTURE_ATLAS_H
diff --git a/editor/import_dock.cpp b/editor/import_dock.cpp
index 15539ee3db..b307ec649a 100644
--- a/editor/import_dock.cpp
+++ b/editor/import_dock.cpp
@@ -438,6 +438,8 @@ void ImportDock::_reimport() {
 		Error err = config->load(params->paths[i] + ".import");
 		ERR_CONTINUE(err != OK);
 
+		String importer_name = params->importer->get_importer_name();
+
 		if (params->checking) {
 			//update only what edited (checkboxes)
 			for (List<PropertyInfo>::Element *E = params->properties.front(); E; E = E->next()) {
@@ -447,7 +449,7 @@ void ImportDock::_reimport() {
 			}
 		} else {
 			//override entirely
-			config->set_value("remap", "importer", params->importer->get_importer_name());
+			config->set_value("remap", "importer", importer_name);
 			config->erase_section("params");
 
 			for (List<PropertyInfo>::Element *E = params->properties.front(); E; E = E->next()) {
@@ -455,6 +457,19 @@ void ImportDock::_reimport() {
 			}
 		}
 
+		//handle group file
+		Ref<ResourceImporter> importer = ResourceFormatImporter::get_singleton()->get_importer_by_name(importer_name);
+		ERR_CONTINUE(!importer.is_valid());
+		String group_file_property = importer->get_option_group_file();
+		if (group_file_property != String()) {
+			//can import from a group (as in, atlas)
+			ERR_CONTINUE(!params->values.has(group_file_property));
+			String group_file = params->values[group_file_property];
+			config->set_value("remap", "group_file", group_file);
+		} else {
+			config->set_value("remap", "group_file", Variant()); //clear group file if unused
+		}
+
 		config->save(params->paths[i] + ".import");
 	}
 
diff --git a/editor/plugins/item_list_editor_plugin.h b/editor/plugins/item_list_editor_plugin.h
index 679235e316..701632e576 100644
--- a/editor/plugins/item_list_editor_plugin.h
+++ b/editor/plugins/item_list_editor_plugin.h
@@ -157,7 +157,7 @@ public:
 	virtual void set_item_enabled(int p_idx, int p_enabled) { pp->set_item_disabled(p_idx, !p_enabled); }
 	virtual bool is_item_enabled(int p_idx) const { return !pp->is_item_disabled(p_idx); }
 
-	virtual void set_item_id(int p_idx, int p_id) { pp->set_item_id(p_idx, p_idx); }
+	virtual void set_item_id(int p_idx, int p_id) { pp->set_item_id(p_idx, p_id); }
 	virtual int get_item_id(int p_idx) const { return pp->get_item_id(p_idx); }
 
 	virtual void set_item_separator(int p_idx, bool p_separator) { pp->set_item_as_separator(p_idx, p_separator); }
diff --git a/editor/plugins/script_text_editor.cpp b/editor/plugins/script_text_editor.cpp
index 543771ad1c..c586985957 100644
--- a/editor/plugins/script_text_editor.cpp
+++ b/editor/plugins/script_text_editor.cpp
@@ -81,6 +81,8 @@ void ScriptTextEditor::set_edited_resource(const RES &p_res) {
 
 	emit_signal("name_changed");
 	code_editor->update_line_and_column();
+
+	_validate_script();
 }
 
 void ScriptTextEditor::_update_member_keywords() {
diff --git a/editor/plugins/sprite_frames_editor_plugin.cpp b/editor/plugins/sprite_frames_editor_plugin.cpp
index 33b8347f94..afe0b23fd9 100644
--- a/editor/plugins/sprite_frames_editor_plugin.cpp
+++ b/editor/plugins/sprite_frames_editor_plugin.cpp
@@ -59,7 +59,7 @@ void SpriteFramesEditor::_sheet_preview_draw() {
 		for (int j = 1; j < v; j++) {
 
 			int x = i * size.width / h;
-			int y = i * size.height / v;
+			int y = j * size.height / v;
 
 			split_sheet_preview->draw_line(Point2(x, 0), Point2(x, size.height), Color(1, 1, 1, a));
 			split_sheet_preview->draw_line(Point2(x + 1, 0), Point2(x + 1, size.height), Color(0, 0, 0, a));
diff --git a/editor/scene_tree_editor.cpp b/editor/scene_tree_editor.cpp
index cd31b943a8..879d072b10 100644
--- a/editor/scene_tree_editor.cpp
+++ b/editor/scene_tree_editor.cpp
@@ -1125,22 +1125,17 @@ SceneTreeEditor::~SceneTreeEditor() {
 
 void SceneTreeDialog::_notification(int p_what) {
 
-	if (p_what == NOTIFICATION_ENTER_TREE) {
-		connect("confirmed", this, "_select");
-	}
-
-	if (p_what == NOTIFICATION_EXIT_TREE) {
-		disconnect("confirmed", this, "_select");
-	}
-	if (p_what == NOTIFICATION_DRAW) {
-
-		RID ci = get_canvas_item();
-		get_stylebox("panel", "PopupMenu")->draw(ci, Rect2(Point2(), get_size()));
-	}
-
-	if (p_what == NOTIFICATION_VISIBILITY_CHANGED && is_visible_in_tree()) {
-
-		tree->update_tree();
+	switch (p_what) {
+		case NOTIFICATION_ENTER_TREE: {
+			connect("confirmed", this, "_select");
+		} break;
+		case NOTIFICATION_EXIT_TREE: {
+			disconnect("confirmed", this, "_select");
+		} break;
+		case NOTIFICATION_VISIBILITY_CHANGED: {
+			if (is_visible_in_tree())
+				tree->update_tree();
+		} break;
 	}
 }
 
@@ -1169,8 +1164,6 @@ SceneTreeDialog::SceneTreeDialog() {
 
 	tree = memnew(SceneTreeEditor(false, false, true));
 	add_child(tree);
-	//set_child_rect(tree);
-
 	tree->get_scene_tree()->connect("item_activated", this, "_select");
 }