A bit of everything:

-IMA-ADPCM support for samples, this means that sound effects can be compressed and use 4 timess less RAM.
-New 3D import workflow based on Wavefront OBJ. Import single objects as mesh resources instead of full scenes. Many people prefers to work this way. Just like the rest of the imported resources, these are updated in realtime if modified externally.
-Mesh resources now support naming surfaces. This helps reimporting to identify which user-created materials must be kept.
-Several fixes and improvements to SurfaceTool.
-Anti Aliasing added to WorldEnvironment effects (using FXAA)
-2D Physics bodies (RigidBody, KinematicBody, etc), Raycasts, Tilemap, etc support collision layers. This makes easy to group which objects collide against which.
-2D Trigger shapes can now also trigger collision reporting in other 2D bodies (it used to be in Area2D before)
-Viewport render target textures can now be filtered.
-Few fixes in GDscript make it easier to work with static functions and class members.
-Several and many bugfixes.

5 files changed, 335 insertions, 155 deletions

diff --git a/scene/resources/environment.cpp b/scene/resources/environment.cpp
index 3e12c7a5b5..0c55d22dbe 100644
--- a/scene/resources/environment.cpp
+++ b/scene/resources/environment.cpp
@@ -101,6 +101,8 @@ void Environment::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("fx_set_param","param","value"),&Environment::fx_set_param);
 	ObjectTypeDB::bind_method(_MD("fx_get_param","param"),&Environment::fx_get_param);
 
+	ADD_PROPERTYI( PropertyInfo(Variant::BOOL,"fxaa/enabled"),_SCS("set_enable_fx"),_SCS("is_fx_enabled"), FX_FXAA);
+
 	ADD_PROPERTY( PropertyInfo(Variant::INT,"background/mode",PROPERTY_HINT_ENUM,"Keep,Default Color,Color,Texture,Cubemap,Texture RGBE,Cubemap RGBE"),_SCS("set_background"),_SCS("get_background"));
 	ADD_PROPERTYI( PropertyInfo(Variant::COLOR,"background/color"),_SCS("set_background_param"),_SCS("get_background_param"), BG_PARAM_COLOR);
 	ADD_PROPERTYI( PropertyInfo(Variant::OBJECT,"background/texture",PROPERTY_HINT_RESOURCE_TYPE,"Texture"),_SCS("set_background_param"),_SCS("get_background_param"), BG_PARAM_TEXTURE);
@@ -181,6 +183,7 @@ void Environment::_bind_methods() {
 	BIND_CONSTANT( BG_PARAM_MAX );
 
 
+	BIND_CONSTANT( FX_FXAA );
 	BIND_CONSTANT( FX_GLOW );
 	BIND_CONSTANT( FX_DOF_BLUR );
 	BIND_CONSTANT( FX_HDR );
diff --git a/scene/resources/environment.h b/scene/resources/environment.h
index c94c81b694..b90a043634 100644
--- a/scene/resources/environment.h
+++ b/scene/resources/environment.h
@@ -60,6 +60,7 @@ public:
 	};
 
 	enum Fx {
+		FX_FXAA=VS::ENV_FX_FXAA,
 		FX_GLOW=VS::ENV_FX_GLOW,
 		FX_DOF_BLUR=VS::ENV_FX_DOF_BLUR,
 		FX_HDR=VS::ENV_FX_HDR,
diff --git a/scene/resources/mesh.cpp b/scene/resources/mesh.cpp
index 6d0a1cf76b..c6e492fcb3 100644
--- a/scene/resources/mesh.cpp
+++ b/scene/resources/mesh.cpp
@@ -92,10 +92,17 @@ bool Mesh::_set(const StringName& p_name, const Variant& p_value) {
 		return true;
 	}
 
-	if (sname.begins_with("materials/")) {
-
-		int idx=sname.get_slice("/",1).to_int()-1;
-		surface_set_material(idx,p_value);
+	if (sname.begins_with("surface_")) {
+
+		int sl=sname.find("/");
+		if (sl==-1)
+			return false;
+		int idx=sname.substr(8,sl-8).to_int()-1;
+		String what = sname.get_slice("/",1);
+		if (what=="material")
+			surface_set_material(idx,p_value);
+		else if (what=="name")
+			surface_set_name(idx,p_value);
 		return true;
 	}
 
@@ -166,10 +173,17 @@ bool Mesh::_get(const StringName& p_name,Variant &r_ret) const {
 
 		r_ret = get_morph_target_mode();
 		return true;
-	} else if (sname.begins_with("materials/")) {
-
-		int idx=sname.get_slice("/",1).to_int()-1;
-		r_ret=surface_get_material(idx);
+	} else if (sname.begins_with("surface_")) {
+
+		int sl=sname.find("/");
+		if (sl==-1)
+			return false;
+		int idx=sname.substr(8,sl-8).to_int()-1;
+		String what = sname.get_slice("/",1);
+		if (what=="material")
+			r_ret=surface_get_material(idx);
+		else if (what=="name")
+			r_ret=surface_get_name(idx);
 		return true;
 	} else if (sname=="custom_aabb/custom_aabb") {
 
@@ -210,7 +224,8 @@ void Mesh::_get_property_list( List<PropertyInfo> *p_list) const {
 	for (int i=0;i<surfaces.size();i++) {
 		
 		p_list->push_back( PropertyInfo( Variant::DICTIONARY,"surfaces/"+itos(i), PROPERTY_HINT_NONE,"",PROPERTY_USAGE_NOEDITOR ) );
-		p_list->push_back( PropertyInfo( Variant::OBJECT,"materials/"+itos(i+1), PROPERTY_HINT_RESOURCE_TYPE,"Material",PROPERTY_USAGE_EDITOR ) );
+		p_list->push_back( PropertyInfo( Variant::STRING,"surface_"+itos(i+1)+"/name", PROPERTY_HINT_NONE,"",PROPERTY_USAGE_EDITOR ) );
+		p_list->push_back( PropertyInfo( Variant::OBJECT,"surface_"+itos(i+1)+"/material", PROPERTY_HINT_RESOURCE_TYPE,"Material",PROPERTY_USAGE_EDITOR ) );
 	}
 
 	p_list->push_back( PropertyInfo( Variant::_AABB,"custom_aabb/custom_aabb" ) );
diff --git a/scene/resources/surface_tool.cpp b/scene/resources/surface_tool.cpp
index d0c159e9f0..2856101674 100644
--- a/scene/resources/surface_tool.cpp
+++ b/scene/resources/surface_tool.cpp
@@ -32,57 +32,56 @@
 #define EQ_VERTEX_DIST 0.00001
 
 
+bool SurfaceTool::Vertex::operator==(const Vertex& p_b) const {
 
-bool SurfaceTool::compare(const Vertex& p_a,const Vertex& p_b) const {
 
-	if (p_a.vertex.distance_to(p_b.vertex)>EQ_VERTEX_DIST)
+	if (vertex!=p_b.vertex)
 		return false;
 
-	if (format&Mesh::ARRAY_FORMAT_TEX_UV) {
+	if (uv!=p_b.uv)
+		return false;
 
-		if (p_a.uv.distance_to(p_b.uv)>EQ_VERTEX_DIST)
-			return false;
-	}
+	if (uv2!=p_b.uv2)
+		return false;
 
-	if (format&Mesh::ARRAY_FORMAT_TEX_UV2) {
+	if (normal!=p_b.normal)
+		return false;
 
-		if (p_a.uv2.distance_to(p_b.uv2)>EQ_VERTEX_DIST)
-			return false;
-	}
+	if (binormal!=p_b.binormal)
+		return false;
 
-	if (format&Mesh::ARRAY_FORMAT_NORMAL) {
-		if (p_a.normal.distance_to(p_b.normal)>EQ_VERTEX_DIST)
-			return false;
-	}
+	if (color!=p_b.color)
+		return false;
 
-	if (format&Mesh::ARRAY_FORMAT_TANGENT) {
-		if (p_a.binormal.distance_to(p_b.binormal)>EQ_VERTEX_DIST)
-			return false;
-		if (p_a.tangent.distance_to(p_b.tangent)>EQ_VERTEX_DIST)
+	if (bones.size()!=p_b.bones.size())
+		return false;
+
+	for(int i=0;i<bones.size();i++) {
+		if (bones[i]!=p_b.bones[i])
 			return false;
 	}
 
-	if (format&Mesh::ARRAY_FORMAT_COLOR) {
-		if (p_a.color!=p_b.color)
+	for(int i=0;i<weights.size();i++) {
+		if (weights[i]!=p_b.weights[i])
 			return false;
 	}
 
-	if (format&Mesh::ARRAY_FORMAT_BONES) {
-		for(int i=0;i<4;i++) {
-			if (Math::abs(p_a.bones[i]-p_b.bones[i])>CMP_EPSILON)
-				return false;
-		}
-	}
+	return true;
+}
 
-	if (format&Mesh::ARRAY_FORMAT_WEIGHTS) {
-		for(int i=0;i<4;i++) {
-			if (Math::abs(p_a.weights[i]-p_b.weights[i])>CMP_EPSILON)
-				return false;
-		}
-	}
 
+uint32_t SurfaceTool::VertexHasher::hash(const Vertex &p_vtx) {
 
-	return true;
+	uint32_t h = hash_djb2_buffer((const uint8_t*)&p_vtx.vertex,sizeof(real_t)*3);
+	h = hash_djb2_buffer((const uint8_t*)&p_vtx.normal,sizeof(real_t)*3,h);
+	h = hash_djb2_buffer((const uint8_t*)&p_vtx.binormal,sizeof(real_t)*3,h);
+	h = hash_djb2_buffer((const uint8_t*)&p_vtx.tangent,sizeof(real_t)*3,h);
+	h = hash_djb2_buffer((const uint8_t*)&p_vtx.uv,sizeof(real_t)*2,h);
+	h = hash_djb2_buffer((const uint8_t*)&p_vtx.uv2,sizeof(real_t)*2,h);
+	h = hash_djb2_buffer((const uint8_t*)&p_vtx.color,sizeof(real_t)*4,h);
+	h = hash_djb2_buffer((const uint8_t*)p_vtx.bones.ptr(),p_vtx.bones.size()*sizeof(int),h);
+	h = hash_djb2_buffer((const uint8_t*)p_vtx.weights.ptr(),p_vtx.weights.size()*sizeof(float),h);
+	return h;
 }
 
 void SurfaceTool::begin(Mesh::PrimitiveType p_primitive) {
@@ -186,6 +185,17 @@ void SurfaceTool::add_weights( const Vector<float>& p_weights) {
 
 }
 
+void SurfaceTool::add_smooth_group(bool p_smooth) {
+
+	ERR_FAIL_COND(!begun);
+	if (index_array.size()) {
+		smooth_groups[index_array.size()]=p_smooth;
+	} else {
+
+		smooth_groups[vertex_array.size()]=p_smooth;
+	}
+}
+
 
 void SurfaceTool::add_index( int p_index) {
 
@@ -377,79 +387,53 @@ Ref<Mesh> SurfaceTool::commit(const Ref<Mesh>& p_existing) {
 
 void SurfaceTool::index() {
 
-#if 0
-	printf("indexing..\n");
-	ERR_FAIL_COND( format & Surface::ARRAY_FORMAT_INDEX ); // already indexed
-
-	index_array.clear();
-	DVector< Vertex > indexed_vertex_array;
+	if (index_array.size())
+		return; //already indexed
 
-	int vertex_array_len = vertex_array.size();
-	vertex_array.read_lock();
-	const Vertex*vertex_array_ptr = vertex_array.read();
 
-	for (int i=0;i<vertex_array_len;i++) {
+	HashMap<Vertex,int,VertexHasher> indices;
+	List<Vertex> new_vertices;
 
-		int index_pos=-1;
+	for(List< Vertex >::Element *E=vertex_array.front();E;E=E->next()) {
 
-		int indexed_vertex_array_len=indexed_vertex_array.size();
-
-		if (indexed_vertex_array_len) {
-
-			indexed_vertex_array.read_lock();
-			const Vertex* indexed_vertex_array_ptr=indexed_vertex_array.read();
-
-			for (int j=0;j<indexed_vertex_array_len;j++) {
-
-				if (vertex_array_ptr[i].same_as(indexed_vertex_array_ptr[j])) {
-
-					index_pos=j;
-					break;
-				}
-			}
-
-			indexed_vertex_array.read_unlock();
-		}
-
-		if (index_pos==-1) {
-
-			index_pos=indexed_vertex_array.size();
-			indexed_vertex_array.push_back(vertex_array_ptr[i]);
+		int *idxptr=indices.getptr(E->get());
+		int idx;
+		if (!idxptr) {
+			idx=indices.size();
+			new_vertices.push_back(E->get());
+			indices[E->get()]=idx;
 		} else {
-
-			indexed_vertex_array.write_lock();
-			indexed_vertex_array.write()[index_pos].normal+=vertex_array_ptr[i].normal;
-			indexed_vertex_array.write()[index_pos].binormal+=vertex_array_ptr[i].binormal;
-			indexed_vertex_array.write()[index_pos].tangent+=vertex_array_ptr[i].tangent;
-			indexed_vertex_array.write_unlock();
+			idx=*idxptr;
 		}
 
-		index_array.push_back(index_pos);
-	}
-
-	int idxvertsize=indexed_vertex_array.size();
-	indexed_vertex_array.write_lock();
-	Vertex* idxvert=indexed_vertex_array.write();
-	for (int i=0;i<idxvertsize;i++) {
+		index_array.push_back(idx);
 
-		idxvert[i].normal.normalize();
-		idxvert[i].tangent.normalize();
-		idxvert[i].binormal.normalize();
 	}
-	indexed_vertex_array.write_unlock();
 
-	vertex_array.read_unlock();
-
-	format|=Surface::ARRAY_FORMAT_INDEX;
-	vertex_array=indexed_vertex_array;
+	vertex_array.clear();
+	vertex_array=new_vertices;
 
-	printf("indexing.. end\n");
-#endif
+	format|=Mesh::ARRAY_FORMAT_INDEX;
 }
 
 void SurfaceTool::deindex() {
 
+	if (index_array.size()==0)
+		return; //nothing to deindex
+	Vector< Vertex > varr;
+	varr.resize(vertex_array.size());
+	int idx=0;
+	for (List< Vertex >::Element *E=vertex_array.front();E;E=E->next()) {
 
+		varr[idx++]=E->get();
+	}
+	vertex_array.clear();
+	for (List<int>::Element *E=index_array.front();E;E=E->next()) {
+
+		ERR_FAIL_INDEX(E->get(),varr.size());
+		vertex_array.push_back(varr[E->get()]);
+	}
+	format&=~Mesh::ARRAY_FORMAT_INDEX;
 }
 
 
@@ -631,80 +615,250 @@ void SurfaceTool::append_from(const Ref<Mesh>& p_existing, int p_surface,const T
 void SurfaceTool::generate_tangents() {
 
 	ERR_FAIL_COND(!(format&Mesh::ARRAY_FORMAT_TEX_UV));
+	ERR_FAIL_COND(!(format&Mesh::ARRAY_FORMAT_NORMAL));
 
-#if 0
 
-	int len=vertex_array.size();
-	vertex_array.write_lock();
-	Vertex *vertexptr=vertex_array.write();
-
-	for (int i=0;i<len/3;i++) {
+	if (index_array.size()) {
 
+		Vector<List<Vertex>::Element*> vtx;
+		vtx.resize(vertex_array.size());
+		int idx=0;
+		for (List<Vertex>::Element *E=vertex_array.front();E;E=E->next()) {
+			vtx[idx++]=E;
+			E->get().binormal=Vector3();
+			E->get().tangent=Vector3();
+		}
 
-		Vector3 v1 = vertexptr[i*3+0].vertex;
-		Vector3 v2 = vertexptr[i*3+1].vertex;
-		Vector3 v3 = vertexptr[i*3+2].vertex;
+		for (List<int>::Element *E=index_array.front();E;) {
+
+			int i[3];
+			i[0]=E->get();
+			E=E->next();
+			ERR_FAIL_COND(!E);
+			i[1]=E->get();
+			E=E->next();
+			ERR_FAIL_COND(!E);
+			i[2]=E->get();
+			E=E->next();
+			ERR_FAIL_COND(!E);
+
+
+			Vector3 v1 = vtx[ i[0] ]->get().vertex;
+			Vector3 v2 = vtx[ i[1] ]->get().vertex;
+			Vector3 v3 = vtx[ i[2] ]->get().vertex;
+
+			Vector2 w1 = vtx[ i[0] ]->get().uv;
+			Vector2 w2 = vtx[ i[1] ]->get().uv;
+			Vector2 w3 = vtx[ i[2] ]->get().uv;
+
+
+			float x1 = v2.x - v1.x;
+			float x2 = v3.x - v1.x;
+			float y1 = v2.y - v1.y;
+			float y2 = v3.y - v1.y;
+			float z1 = v2.z - v1.z;
+			float z2 = v3.z - v1.z;
+
+			float s1 = w2.x - w1.x;
+			float s2 = w3.x - w1.x;
+			float t1 = w2.y - w1.y;
+			float t2 = w3.y - w1.y;
+
+			float r  = (s1 * t2 - s2 * t1);
+
+			Vector3 binormal,tangent;
+
+			if (r==0) {
+				binormal=Vector3(0,0,0);
+				tangent=Vector3(0,0,0);
+			} else {
+				tangent = Vector3((t2 * x1 - t1 * x2) * r, (t2 * y1 - t1 * y2) * r,
+				(t2 * z1 - t1 * z2) * r);
+				binormal = Vector3((s1 * x2 - s2 * x1) * r, (s1 * y2 - s2 * y1) * r,
+				(s1 * z2 - s2 * z1) * r);
+			}
 
-		Vector3 w1 = vertexptr[i*3+0].uv[0];
-		Vector3 w2 = vertexptr[i*3+1].uv[0];
-		Vector3 w3 = vertexptr[i*3+2].uv[0];
+			tangent.normalize();
+			binormal.normalize();
+			Vector3 normal=Plane( v1, v2, v3 ).normal;
 
+			Vector3 tangentp = tangent - normal * normal.dot( tangent );
+			Vector3 binormalp = binormal - normal * (normal.dot(binormal)) - tangent * (tangent.dot(binormal));
 
-		float x1 = v2.x - v1.x;
-		float x2 = v3.x - v1.x;
-		float y1 = v2.y - v1.y;
-		float y2 = v3.y - v1.y;
-		float z1 = v2.z - v1.z;
-		float z2 = v3.z - v1.z;
+			tangentp.normalize();
+			binormalp.normalize();
 
-		float s1 = w2.x - w1.x;
-		float s2 = w3.x - w1.x;
-		float t1 = w2.y - w1.y;
-		float t2 = w3.y - w1.y;
 
-		float r  = (s1 * t2 - s2 * t1);
+			for (int j=0;j<3;j++) {
+				vtx[ i[j] ]->get().binormal+=binormalp;
+				vtx[ i[j] ]->get().tangent+=tangentp;
 
-		Vector3 binormal,tangent;
+			}
+		}
 
-		if (r==0) {
-			binormal=Vector3(0,0,0);
-			tangent=Vector3(0,0,0);
-		} else {
-			tangent = Vector3((t2 * x1 - t1 * x2) * r, (t2 * y1 - t1 * y2) * r,
-			(t2 * z1 - t1 * z2) * r);
-			binormal = Vector3((s1 * x2 - s2 * x1) * r, (s1 * y2 - s2 * y1) * r,
-			(s1 * z2 - s2 * z1) * r);
+		for (List<Vertex>::Element *E=vertex_array.front();E;E=E->next()) {
+			E->get().binormal.normalize();
+			E->get().tangent.normalize();
 		}
 
-		tangent.normalize();
-		binormal.normalize();
-		Vector3 normal=Plane( v1, v2, v3 ).normal;
 
-		Vector3 tangentp = tangent - normal * normal.dot( tangent );
-		Vector3 binormalp = binormal - normal * (normal.dot(binormal)) - tangent * (tangent.dot(binormal));
+	} else {
+
 
-		tangentp.normalize();
-		binormalp.normalize();
+		for (List<Vertex>::Element *E=vertex_array.front();E;) {
 
+			List< Vertex >::Element *v[3];
+			v[0]=E;
+			v[1]=v[0]->next();
+			ERR_FAIL_COND(!v[1]);
+			v[2]=v[1]->next();
+			ERR_FAIL_COND(!v[2]);
+			E=v[2]->next();
 
-		for (int j=0;j<3;j++) {
-			vertexptr[i*3+j].normal=normal;
-			vertexptr[i*3+j].binormal=binormalp;
-			vertexptr[i*3+j].tangent=tangentp;
+			Vector3 v1 = v[0]->get().vertex;
+			Vector3 v2 = v[1]->get().vertex;
+			Vector3 v3 = v[2]->get().vertex;
+
+			Vector2 w1 = v[0]->get().uv;
+			Vector2 w2 = v[1]->get().uv;
+			Vector2 w3 = v[2]->get().uv;
+
+
+			float x1 = v2.x - v1.x;
+			float x2 = v3.x - v1.x;
+			float y1 = v2.y - v1.y;
+			float y2 = v3.y - v1.y;
+			float z1 = v2.z - v1.z;
+			float z2 = v3.z - v1.z;
+
+			float s1 = w2.x - w1.x;
+			float s2 = w3.x - w1.x;
+			float t1 = w2.y - w1.y;
+			float t2 = w3.y - w1.y;
+
+			float r  = (s1 * t2 - s2 * t1);
+
+			Vector3 binormal,tangent;
+
+			if (r==0) {
+				binormal=Vector3(0,0,0);
+				tangent=Vector3(0,0,0);
+			} else {
+				tangent = Vector3((t2 * x1 - t1 * x2) * r, (t2 * y1 - t1 * y2) * r,
+				(t2 * z1 - t1 * z2) * r);
+				binormal = Vector3((s1 * x2 - s2 * x1) * r, (s1 * y2 - s2 * y1) * r,
+				(s1 * z2 - s2 * z1) * r);
+			}
+
+			tangent.normalize();
+			binormal.normalize();
+			Vector3 normal=Plane( v1, v2, v3 ).normal;
+
+			Vector3 tangentp = tangent - normal * normal.dot( tangent );
+			Vector3 binormalp = binormal - normal * (normal.dot(binormal)) - tangent * (tangent.dot(binormal));
+
+			tangentp.normalize();
+			binormalp.normalize();
+
+
+			for (int j=0;j<3;j++) {
+				v[j]->get().binormal=binormalp;
+				v[j]->get().tangent=tangentp;
+
+			}
 		}
 	}
 
-	format|=Surface::ARRAY_FORMAT_TANGENT;
-	printf("adding tangents to the format\n");
+	format|=Mesh::ARRAY_FORMAT_TANGENT;
 
-	vertex_array.write_unlock();
-#endif
 }
 
-void SurfaceTool::generate_flat_normals() {
+void SurfaceTool::generate_normals() {
 
-}
-void SurfaceTool::generate_smooth_normals() {
+	ERR_FAIL_COND(primitive!=Mesh::PRIMITIVE_TRIANGLES);
+
+	bool was_indexed=index_array.size();
+
+	deindex();
+
+	HashMap<Vertex,Vector3,VertexHasher> vertex_hash;
+
+	int count=0;
+	bool smooth=false;
+	if (smooth_groups.has(0))
+		smooth=smooth_groups[0];
+
+	print_line("SMOOTH BEGIN? "+itos(smooth));
+
+	List< Vertex >::Element *B=vertex_array.front();
+	for(List< Vertex >::Element *E=B;E;) {
+
+		List< Vertex >::Element *v[3];
+		v[0]=E;
+		v[1]=v[0]->next();
+		ERR_FAIL_COND(!v[1]);
+		v[2]=v[1]->next();
+		ERR_FAIL_COND(!v[2]);
+		E=v[2]->next();
+
+		Vector3 normal = Plane(v[0]->get().vertex,v[1]->get().vertex,v[2]->get().vertex).normal;
+
+		if (smooth) {
+
+			for(int i=0;i<3;i++) {
+
+				Vector3 *lv=vertex_hash.getptr(v[i]->get());
+				if (!lv) {
+					vertex_hash.set(v[i]->get(),normal);
+				} else {
+					(*lv)+=normal;
+				}
+			}
+		} else {
+
+			for(int i=0;i<3;i++) {
+
+				v[i]->get().normal=normal;
+
+			}
+		}
+		count+=3;
+
+		if (smooth_groups.has(count) || !E) {
+
+			if (vertex_hash.size()) {
+
+				while (B!=E) {
+
+
+					Vector3* lv=vertex_hash.getptr(B->get());
+					if (lv) {
+						B->get().normal=lv->normalized();
+					}
+
+					B=B->next();
+				}
+
+			} else {
+				B=E;
+			}
+
+			vertex_hash.clear();
+			if (E) {
+				smooth=smooth_groups[count];
+				print_line("SMOOTH AT "+itos(count)+": "+itos(smooth));
+
+			}
+		}
+
+	}
+
+	format|=Mesh::ARRAY_FORMAT_NORMAL;
+
+	if (was_indexed) {
+		index();
+		smooth_groups.clear();
+	}
 
 }
 
@@ -722,6 +876,7 @@ void SurfaceTool::clear() {
 	last_weights.clear();
 	index_array.clear();
 	vertex_array.clear();
+	smooth_groups.clear();
 
 }
 
@@ -736,12 +891,12 @@ void SurfaceTool::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("add_uv2","uv2"),&SurfaceTool::add_uv2);
 	ObjectTypeDB::bind_method(_MD("add_bones","bones"),&SurfaceTool::add_bones);
 	ObjectTypeDB::bind_method(_MD("add_weights","weights"),&SurfaceTool::add_weights);
+	ObjectTypeDB::bind_method(_MD("add_smooth_group","smooth"),&SurfaceTool::add_smooth_group);
 	ObjectTypeDB::bind_method(_MD("set_material","material:Material"),&SurfaceTool::set_material);
 	ObjectTypeDB::bind_method(_MD("index"),&SurfaceTool::index);
 	ObjectTypeDB::bind_method(_MD("deindex"),&SurfaceTool::deindex);
-	ObjectTypeDB::bind_method(_MD("generate_flat_normals"),&SurfaceTool::generate_flat_normals);
-	ObjectTypeDB::bind_method(_MD("generate_smooth_normals"),&SurfaceTool::generate_smooth_normals);
-	ObjectTypeDB::bind_method(_MD("generate_tangents"),&SurfaceTool::generate_tangents);
+	///ObjectTypeDB::bind_method(_MD("generate_flat_normals"),&SurfaceTool::generate_flat_normals);
+	ObjectTypeDB::bind_method(_MD("generate_normals"),&SurfaceTool::generate_normals);
 	ObjectTypeDB::bind_method(_MD("commit:Mesh","existing:Mesh"),&SurfaceTool::commit,DEFVAL( RefPtr() ));
 	ObjectTypeDB::bind_method(_MD("clear"),&SurfaceTool::clear);
 
diff --git a/scene/resources/surface_tool.h b/scene/resources/surface_tool.h
index 8f0fcaa01a..fe82d3a4ce 100644
--- a/scene/resources/surface_tool.h
+++ b/scene/resources/surface_tool.h
@@ -49,12 +49,17 @@ public:
 			Vector<int> bones;
 			Vector<float> weights;
 
+			bool operator==(const Vertex& p_vertex) const;
+
 			Vertex() {  }
 	};
 
 
 private:
-	bool compare(const Vertex& p_a,const Vertex& p_b) const;
+
+	struct VertexHasher {
+		static _FORCE_INLINE_ uint32_t hash(const Vertex &p_vtx);
+	};
 
 	bool begun;
 	bool first;
@@ -64,6 +69,7 @@ private:
 	//arrays
 	List< Vertex > vertex_array;
 	List< int > index_array;
+	Map<int,bool> smooth_groups;
 
 	//memory
 	Color last_color;
@@ -92,13 +98,13 @@ public:
 	void add_uv2( const Vector2& p_uv);
 	void add_bones( const Vector<int>& p_indices);
 	void add_weights( const Vector<float>& p_weights);
+	void add_smooth_group(bool p_smooth);
 
 	void add_index( int p_index);
 
 	void index();
 	void deindex();
-	void generate_flat_normals();
-	void generate_smooth_normals();
+	void generate_normals();
 	void generate_tangents();
 
 	void add_to_format(int p_flags) { format|=p_flags; }