Many fixes to GLES2 renderer, fixed compilation issues in GLES3 shaders.

8 files changed, 72 insertions, 97 deletions

diff --git a/drivers/gles2/rasterizer_scene_gles2.cpp b/drivers/gles2/rasterizer_scene_gles2.cpp
index 06d355802a..0567aea7a6 100644
--- a/drivers/gles2/rasterizer_scene_gles2.cpp
+++ b/drivers/gles2/rasterizer_scene_gles2.cpp
@@ -913,6 +913,7 @@ void RasterizerSceneGLES2::_add_geometry_with_material(RasterizerStorageGLES2::G
 	e->use_accum = false;
 	e->light_index = RenderList::MAX_LIGHTS;
 	e->use_accum_ptr = &e->use_accum;
+	e->instancing = (e->instance->base_type == VS::INSTANCE_MULTIMESH) ? 1 : 0;
 
 	if (e->geometry->last_pass != render_pass) {
 		e->geometry->last_pass = render_pass;
@@ -1219,7 +1220,7 @@ void RasterizerSceneGLES2::_setup_geometry(RenderList::Element *p_element, Raste
 					glDisableVertexAttribArray(i);
 					switch (i) {
 						case VS::ARRAY_NORMAL: {
-							glVertexAttrib4f(VS::ARRAY_COLOR, 0.0, 0.0, 1, 1);
+							glVertexAttrib4f(VS::ARRAY_NORMAL, 0.0, 0.0, 1, 1);
 						} break;
 						case VS::ARRAY_COLOR: {
 							glVertexAttrib4f(VS::ARRAY_COLOR, 1, 1, 1, 1);
@@ -1230,7 +1231,7 @@ void RasterizerSceneGLES2::_setup_geometry(RenderList::Element *p_element, Raste
 				}
 			}
 
-			bool clear_skeleton_buffer = !storage->config.float_texture_supported;
+			//bool clear_skeleton_buffer = !storage->config.float_texture_supported;
 
 			if (p_skeleton) {
 
@@ -1342,29 +1343,18 @@ void RasterizerSceneGLES2::_setup_geometry(RenderList::Element *p_element, Raste
 					//enable transform buffer and bind it
 					glBindBuffer(GL_ARRAY_BUFFER, storage->resources.skeleton_transform_buffer);
 
-					glEnableVertexAttribArray(VS::ARRAY_MAX + 0);
-					glEnableVertexAttribArray(VS::ARRAY_MAX + 1);
-					glEnableVertexAttribArray(VS::ARRAY_MAX + 2);
+					glEnableVertexAttribArray(INSTANCE_BONE_BASE + 0);
+					glEnableVertexAttribArray(INSTANCE_BONE_BASE + 1);
+					glEnableVertexAttribArray(INSTANCE_BONE_BASE + 2);
 
-					glVertexAttribPointer(VS::ARRAY_MAX + 0, 4, GL_FLOAT, GL_FALSE, sizeof(float) * 12, (const void *)(sizeof(float) * 4 * 0));
-					glVertexAttribPointer(VS::ARRAY_MAX + 1, 4, GL_FLOAT, GL_FALSE, sizeof(float) * 12, (const void *)(sizeof(float) * 4 * 1));
-					glVertexAttribPointer(VS::ARRAY_MAX + 2, 4, GL_FLOAT, GL_FALSE, sizeof(float) * 12, (const void *)(sizeof(float) * 4 * 2));
+					glVertexAttribPointer(INSTANCE_BONE_BASE + 0, 4, GL_FLOAT, GL_FALSE, sizeof(float) * 12, (const void *)(sizeof(float) * 4 * 0));
+					glVertexAttribPointer(INSTANCE_BONE_BASE + 1, 4, GL_FLOAT, GL_FALSE, sizeof(float) * 12, (const void *)(sizeof(float) * 4 * 1));
+					glVertexAttribPointer(INSTANCE_BONE_BASE + 2, 4, GL_FLOAT, GL_FALSE, sizeof(float) * 12, (const void *)(sizeof(float) * 4 * 2));
 
-					clear_skeleton_buffer = false;
+					//clear_skeleton_buffer = false;
 				}
 			}
 
-			if (clear_skeleton_buffer) {
-				// just to make sure
-				glDisableVertexAttribArray(VS::ARRAY_MAX + 0);
-				glDisableVertexAttribArray(VS::ARRAY_MAX + 1);
-				glDisableVertexAttribArray(VS::ARRAY_MAX + 2);
-
-				glVertexAttrib4f(VS::ARRAY_MAX + 0, 1, 0, 0, 0);
-				glVertexAttrib4f(VS::ARRAY_MAX + 1, 0, 1, 0, 0);
-				glVertexAttrib4f(VS::ARRAY_MAX + 2, 0, 0, 1, 0);
-			}
-
 		} break;
 
 		case VS::INSTANCE_MULTIMESH: {
@@ -1384,7 +1374,7 @@ void RasterizerSceneGLES2::_setup_geometry(RenderList::Element *p_element, Raste
 					glDisableVertexAttribArray(i);
 					switch (i) {
 						case VS::ARRAY_NORMAL: {
-							glVertexAttrib4f(VS::ARRAY_COLOR, 0.0, 0.0, 1, 1);
+							glVertexAttrib4f(VS::ARRAY_NORMAL, 0.0, 0.0, 1, 1);
 						} break;
 						case VS::ARRAY_COLOR: {
 							glVertexAttrib4f(VS::ARRAY_COLOR, 1, 1, 1, 1);
@@ -1395,16 +1385,12 @@ void RasterizerSceneGLES2::_setup_geometry(RenderList::Element *p_element, Raste
 				}
 			}
 
-			if (!storage->config.float_texture_supported) {
-				// just to make sure, clear skeleton buffer too
-				glDisableVertexAttribArray(VS::ARRAY_MAX + 0);
-				glDisableVertexAttribArray(VS::ARRAY_MAX + 1);
-				glDisableVertexAttribArray(VS::ARRAY_MAX + 2);
-
-				glVertexAttrib4f(VS::ARRAY_MAX + 0, 1, 0, 0, 0);
-				glVertexAttrib4f(VS::ARRAY_MAX + 1, 0, 1, 0, 0);
-				glVertexAttrib4f(VS::ARRAY_MAX + 2, 0, 0, 1, 0);
-			}
+			// prepare multimesh (disable)
+			glDisableVertexAttribArray(INSTANCE_ATTRIB_BASE + 0);
+			glDisableVertexAttribArray(INSTANCE_ATTRIB_BASE + 1);
+			glDisableVertexAttribArray(INSTANCE_ATTRIB_BASE + 2);
+			glDisableVertexAttribArray(INSTANCE_ATTRIB_BASE + 3);
+			glDisableVertexAttribArray(INSTANCE_ATTRIB_BASE + 4);
 
 		} break;
 
@@ -1430,7 +1416,7 @@ void RasterizerSceneGLES2::_render_geometry(RenderList::Element *p_element) {
 			} else {
 				glDrawArrays(gl_primitive[s->primitive], 0, s->array_len);
 			}
-
+			/*
 			if (p_element->instance->skeleton.is_valid() && s->attribs[VS::ARRAY_BONES].enabled && s->attribs[VS::ARRAY_WEIGHTS].enabled) {
 				//clean up after skeleton
 				glBindBuffer(GL_ARRAY_BUFFER, storage->resources.skeleton_transform_buffer);
@@ -1443,7 +1429,7 @@ void RasterizerSceneGLES2::_render_geometry(RenderList::Element *p_element) {
 				glVertexAttrib4f(VS::ARRAY_MAX + 1, 0, 1, 0, 0);
 				glVertexAttrib4f(VS::ARRAY_MAX + 2, 0, 0, 1, 0);
 			}
-
+*/
 		} break;
 
 		case VS::INSTANCE_MULTIMESH: {
@@ -1464,53 +1450,33 @@ void RasterizerSceneGLES2::_render_geometry(RenderList::Element *p_element) {
 
 			// drawing
 
+			const float *base_buffer = multi_mesh->data.ptr();
+
 			for (int i = 0; i < amount; i++) {
-				float *buffer = &multi_mesh->data.write[i * stride];
+				const float *buffer = base_buffer + i * stride;
 
 				{
-					// inline of multimesh_get_transform since it's such a pain
-					// to get a RID from here...
-					Transform transform;
-
-					transform.basis.elements[0][0] = buffer[0];
-					transform.basis.elements[0][1] = buffer[1];
-					transform.basis.elements[0][2] = buffer[2];
-					transform.origin.x = buffer[3];
-					transform.basis.elements[1][0] = buffer[4];
-					transform.basis.elements[1][1] = buffer[5];
-					transform.basis.elements[1][2] = buffer[6];
-					transform.origin.y = buffer[7];
-					transform.basis.elements[2][0] = buffer[8];
-					transform.basis.elements[2][1] = buffer[9];
-					transform.basis.elements[2][2] = buffer[10];
-					transform.origin.z = buffer[11];
-
-					float row[3][4] = {
-						{ transform.basis[0][0], transform.basis[0][1], transform.basis[0][2], transform.origin[0] },
-						{ transform.basis[1][0], transform.basis[1][1], transform.basis[1][2], transform.origin[1] },
-						{ transform.basis[2][0], transform.basis[2][1], transform.basis[2][2], transform.origin[2] },
-					};
-
-					glVertexAttrib4fv(VS::ARRAY_MAX + 0, row[0]);
-					glVertexAttrib4fv(VS::ARRAY_MAX + 1, row[1]);
-					glVertexAttrib4fv(VS::ARRAY_MAX + 2, row[2]);
+
+					glVertexAttrib4fv(INSTANCE_ATTRIB_BASE + 0, &buffer[0]);
+					glVertexAttrib4fv(INSTANCE_ATTRIB_BASE + 1, &buffer[4]);
+					glVertexAttrib4fv(INSTANCE_ATTRIB_BASE + 2, &buffer[8]);
 				}
 
 				if (multi_mesh->color_floats) {
 					if (multi_mesh->color_format == VS::MULTIMESH_COLOR_8BIT) {
 						uint8_t *color_data = (uint8_t *)(buffer + color_ofs);
-						glVertexAttrib4f(VS::ARRAY_MAX + 3, color_data[0] / 255.0, color_data[1] / 255.0, color_data[2] / 255.0, color_data[3] / 255.0);
+						glVertexAttrib4f(INSTANCE_ATTRIB_BASE + 3, color_data[0] / 255.0, color_data[1] / 255.0, color_data[2] / 255.0, color_data[3] / 255.0);
 					} else {
-						glVertexAttrib4fv(VS::ARRAY_MAX + 3, buffer + color_ofs);
+						glVertexAttrib4fv(INSTANCE_ATTRIB_BASE + 3, buffer + color_ofs);
 					}
 				}
 
 				if (multi_mesh->custom_data_floats) {
 					if (multi_mesh->custom_data_format == VS::MULTIMESH_CUSTOM_DATA_8BIT) {
 						uint8_t *custom_data = (uint8_t *)(buffer + custom_data_ofs);
-						glVertexAttrib4f(VS::ARRAY_MAX + 4, custom_data[0] / 255.0, custom_data[1] / 255.0, custom_data[2] / 255.0, custom_data[3] / 255.0);
+						glVertexAttrib4f(INSTANCE_ATTRIB_BASE + 4, custom_data[0] / 255.0, custom_data[1] / 255.0, custom_data[2] / 255.0, custom_data[3] / 255.0);
 					} else {
-						glVertexAttrib4fv(VS::ARRAY_MAX + 4, buffer + custom_data_ofs);
+						glVertexAttrib4fv(INSTANCE_ATTRIB_BASE + 4, buffer + custom_data_ofs);
 					}
 				}
 
@@ -2010,6 +1976,7 @@ void RasterizerSceneGLES2::_render_render_list(RenderList::Element **p_elements,
 	RasterizerStorageGLES2::Material *prev_material = NULL;
 	RasterizerStorageGLES2::Geometry *prev_geometry = NULL;
 	RasterizerStorageGLES2::Skeleton *prev_skeleton = NULL;
+	RasterizerStorageGLES2::GeometryOwner *prev_owner = NULL;
 
 	Transform view_transform_inverse = p_view_transform.inverse();
 	CameraMatrix projection_inverse = p_projection.inverse();
@@ -2193,7 +2160,7 @@ void RasterizerSceneGLES2::_render_render_list(RenderList::Element **p_elements,
 			}
 		}
 
-		bool instancing = e->instancing;
+		bool instancing = e->instance->base_type == VS::INSTANCE_MULTIMESH;
 
 		if (instancing != prev_instancing) {
 
@@ -2206,7 +2173,7 @@ void RasterizerSceneGLES2::_render_render_list(RenderList::Element **p_elements,
 		if (skeleton != prev_skeleton) {
 
 			if (skeleton) {
-				state.scene_shader.set_conditional(SceneShaderGLES2::USE_SKELETON, skeleton != NULL);
+				state.scene_shader.set_conditional(SceneShaderGLES2::USE_SKELETON, true);
 				state.scene_shader.set_conditional(SceneShaderGLES2::USE_SKELETON_SOFTWARE, !storage->config.float_texture_supported);
 			} else {
 				state.scene_shader.set_conditional(SceneShaderGLES2::USE_SKELETON, false);
@@ -2216,7 +2183,7 @@ void RasterizerSceneGLES2::_render_render_list(RenderList::Element **p_elements,
 			rebind = true;
 		}
 
-		if (e->geometry != prev_geometry || skeleton != prev_skeleton) {
+		if (e->owner != prev_owner || e->geometry != prev_geometry || skeleton != prev_skeleton) {
 			_setup_geometry(e, skeleton);
 		}
 
@@ -2225,7 +2192,7 @@ void RasterizerSceneGLES2::_render_render_list(RenderList::Element **p_elements,
 			shader_rebind = _setup_material(material, p_reverse_cull, p_alpha_pass, Size2i(skeleton ? skeleton->size * 3 : 0, 0));
 		}
 
-		if (i == 0 || shader_rebind) { //first time must rebindmakin
+		if (i == 0 || shader_rebind) { //first time must rebind
 
 			if (p_shadow) {
 				state.scene_shader.set_uniform(SceneShaderGLES2::LIGHT_BIAS, p_shadow_bias);
@@ -2286,6 +2253,7 @@ void RasterizerSceneGLES2::_render_render_list(RenderList::Element **p_elements,
 		_render_geometry(e);
 
 		prev_geometry = e->geometry;
+		prev_owner = e->owner;
 		prev_material = material;
 		prev_skeleton = skeleton;
 		prev_instancing = instancing;
@@ -2297,8 +2265,10 @@ void RasterizerSceneGLES2::_render_render_list(RenderList::Element **p_elements,
 	}
 
 	_setup_light_type(NULL, NULL); //clear light stuff
+	state.scene_shader.set_conditional(SceneShaderGLES2::USE_SKELETON, false);
 	state.scene_shader.set_conditional(SceneShaderGLES2::SHADELESS, false);
 	state.scene_shader.set_conditional(SceneShaderGLES2::BASE_PASS, false);
+	state.scene_shader.set_conditional(SceneShaderGLES2::USE_INSTANCING, false);
 	state.scene_shader.set_conditional(SceneShaderGLES2::USE_RADIANCE_MAP, false);
 	state.scene_shader.set_conditional(SceneShaderGLES2::LIGHT_USE_PSSM4, false);
 	state.scene_shader.set_conditional(SceneShaderGLES2::LIGHT_USE_PSSM2, false);
diff --git a/drivers/gles2/rasterizer_scene_gles2.h b/drivers/gles2/rasterizer_scene_gles2.h
index 9e3483fcd7..64790fcd0e 100644
--- a/drivers/gles2/rasterizer_scene_gles2.h
+++ b/drivers/gles2/rasterizer_scene_gles2.h
@@ -59,6 +59,11 @@ public:
 		SHADOW_FILTER_PCF13,
 	};
 
+	enum {
+		INSTANCE_ATTRIB_BASE = 8,
+		INSTANCE_BONE_BASE = 13,
+	};
+
 	ShadowFilterMode shadow_filter_mode;
 
 	RID default_material;
diff --git a/drivers/gles2/rasterizer_storage_gles2.cpp b/drivers/gles2/rasterizer_storage_gles2.cpp
index bf51fcc027..0863e03b76 100644
--- a/drivers/gles2/rasterizer_storage_gles2.cpp
+++ b/drivers/gles2/rasterizer_storage_gles2.cpp
@@ -2624,10 +2624,10 @@ void RasterizerStorageGLES2::update_dirty_multimeshes() {
 
 			if (multimesh->mesh.is_valid()) {
 				mesh_aabb = mesh_get_aabb(multimesh->mesh, RID());
-			} else {
-				mesh_aabb.size += Vector3(0.001, 0.001, 0.001);
 			}
 
+			mesh_aabb.size += Vector3(0.001, 0.001, 0.001); //in case mesh is empty in one of the sides
+
 			int stride = multimesh->color_floats + multimesh->xform_floats + multimesh->custom_data_floats;
 			int count = multimesh->data.size();
 			float *data = multimesh->data.ptrw();
@@ -3781,7 +3781,7 @@ void RasterizerStorageGLES2::instance_remove_skeleton(RID p_skeleton, Rasterizer
 
 void RasterizerStorageGLES2::instance_add_dependency(RID p_base, RasterizerScene::InstanceBase *p_instance) {
 
-	Instanciable *inst = NULL;
+	Instantiable *inst = NULL;
 	switch (p_instance->base_type) {
 		case VS::INSTANCE_MESH: {
 			inst = mesh_owner.getornull(p_base);
@@ -3827,7 +3827,7 @@ void RasterizerStorageGLES2::instance_add_dependency(RID p_base, RasterizerScene
 
 void RasterizerStorageGLES2::instance_remove_dependency(RID p_base, RasterizerScene::InstanceBase *p_instance) {
 
-	Instanciable *inst = NULL;
+	Instantiable *inst = NULL;
 
 	switch (p_instance->base_type) {
 		case VS::INSTANCE_MESH: {
@@ -4542,6 +4542,7 @@ void RasterizerStorageGLES2::update_dirty_resources() {
 	update_dirty_shaders();
 	update_dirty_materials();
 	update_dirty_skeletons();
+	update_dirty_multimeshes();
 }
 
 RasterizerStorageGLES2::RasterizerStorageGLES2() {
diff --git a/drivers/gles2/rasterizer_storage_gles2.h b/drivers/gles2/rasterizer_storage_gles2.h
index da7e200c96..b42e2dfb1f 100644
--- a/drivers/gles2/rasterizer_storage_gles2.h
+++ b/drivers/gles2/rasterizer_storage_gles2.h
@@ -157,7 +157,7 @@ public:
 	//////////////////////////////////DATA///////////////////////////////////////////////////
 	/////////////////////////////////////////////////////////////////////////////////////////
 
-	struct Instanciable : public RID_Data {
+	struct Instantiable : public RID_Data {
 		SelfList<RasterizerScene::InstanceBase>::List instance_list;
 
 		_FORCE_INLINE_ void instance_change_notify() {
@@ -187,15 +187,15 @@ public:
 			}
 		}
 
-		Instanciable() {}
+		Instantiable() {}
 
-		virtual ~Instanciable() {}
+		virtual ~Instantiable() {}
 	};
 
-	struct GeometryOwner : public Instanciable {
+	struct GeometryOwner : public Instantiable {
 	};
 
-	struct Geometry : public Instanciable {
+	struct Geometry : public Instantiable {
 
 		enum Type {
 			GEOMETRY_INVALID,
@@ -893,7 +893,7 @@ public:
 
 	/* Light API */
 
-	struct Light : Instanciable {
+	struct Light : Instantiable {
 		VS::LightType type;
 		float param[VS::LIGHT_PARAM_MAX];
 
@@ -956,7 +956,7 @@ public:
 
 	/* PROBE API */
 
-	struct ReflectionProbe : Instanciable {
+	struct ReflectionProbe : Instantiable {
 
 		VS::ReflectionProbeUpdateMode update_mode;
 		float intensity;
@@ -1046,7 +1046,7 @@ public:
 
 	/* LIGHTMAP */
 
-	struct LightmapCapture : public Instanciable {
+	struct LightmapCapture : public Instantiable {
 
 		PoolVector<LightmapCaptureOctree> octree;
 		AABB bounds;
diff --git a/drivers/gles2/shader_compiler_gles2.cpp b/drivers/gles2/shader_compiler_gles2.cpp
index bedcfbb798..082c520480 100644
--- a/drivers/gles2/shader_compiler_gles2.cpp
+++ b/drivers/gles2/shader_compiler_gles2.cpp
@@ -643,11 +643,11 @@ String ShaderCompilerGLES2::_dump_node_code(SL::Node *p_node, int p_level, Gener
 
 				case SL::OP_MOD: {
 
-					code += "mod(";
+					code += "mod(float(";
 					code += _dump_node_code(op_node->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
-					code += ", ";
+					code += "), float(";
 					code += _dump_node_code(op_node->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
-					code += ")";
+					code += "))";
 				} break;
 
 				default: {
diff --git a/drivers/gles2/shaders/scene.glsl b/drivers/gles2/shaders/scene.glsl
index b27bf0d12b..468804cc5a 100644
--- a/drivers/gles2/shaders/scene.glsl
+++ b/drivers/gles2/shaders/scene.glsl
@@ -43,9 +43,9 @@ attribute vec2 uv2_attrib; // attrib:5
 
 #ifdef USE_SKELETON_SOFTWARE
 
-attribute highp vec4 bone_transform_row_0; // attrib:8
-attribute highp vec4 bone_transform_row_1; // attrib:9
-attribute highp vec4 bone_transform_row_2; // attrib:10
+attribute highp vec4 bone_transform_row_0; // attrib:13
+attribute highp vec4 bone_transform_row_1; // attrib:14
+attribute highp vec4 bone_transform_row_2; // attrib:15
 
 #else
 
@@ -130,11 +130,6 @@ uniform highp float shadow_dual_paraboloid_render_side;
 
 #if defined(USE_SHADOW) && defined(USE_LIGHTING)
 
-#ifdef LIGHT_MODE_DIRECTIONAL
-uniform highp sampler2D light_directional_shadow; // texunit:-3
-uniform highp vec4 light_split_offsets;
-#endif
-
 uniform highp mat4 light_shadow_matrix;
 varying highp vec4 shadow_coord;
 
@@ -306,6 +301,7 @@ void main() {
 				vec4(0.0, 0.0, 0.0, 1.0));
 		world_matrix = world_matrix * transpose(m);
 	}
+
 #endif
 
 	vec3 normal = normal_attrib * normal_mult;
diff --git a/drivers/gles3/shaders/scene.glsl b/drivers/gles3/shaders/scene.glsl
index 7da20dfa00..bcaf4a57a8 100644
--- a/drivers/gles3/shaders/scene.glsl
+++ b/drivers/gles3/shaders/scene.glsl
@@ -1136,8 +1136,9 @@ float sample_shadow(highp sampler2DShadow shadow, vec2 shadow_pixel_size, vec2 p
 	avg += textureProj(shadow, vec4(pos + vec2(0.0, shadow_pixel_size.y * 2.0), depth, 1.0));
 	avg += textureProj(shadow, vec4(pos + vec2(0.0, -shadow_pixel_size.y * 2.0), depth, 1.0));
 	return avg * (1.0 / 13.0);
+#endif
 
-#elif defined(SHADOW_MODE_PCF_5)
+#ifdef SHADOW_MODE_PCF_5
 
 	float avg = textureProj(shadow, vec4(pos, depth, 1.0));
 	avg += textureProj(shadow, vec4(pos + vec2(shadow_pixel_size.x, 0.0), depth, 1.0));
@@ -1146,7 +1147,9 @@ float sample_shadow(highp sampler2DShadow shadow, vec2 shadow_pixel_size, vec2 p
 	avg += textureProj(shadow, vec4(pos + vec2(0.0, -shadow_pixel_size.y), depth, 1.0));
 	return avg * (1.0 / 5.0);
 
-#else
+#endif
+
+#if !defined(SHADOW_MODE_PCF_5) || !defined(SHADOW_MODE_PCF_13)
 
 	return textureProj(shadow, vec4(pos, depth, 1.0));
 
diff --git a/scene/resources/material.cpp b/scene/resources/material.cpp
index c898aaff34..b671b1f874 100644
--- a/scene/resources/material.cpp
+++ b/scene/resources/material.cpp
@@ -610,11 +610,11 @@ void SpatialMaterial::_update_shader() {
 			code += "\tMODELVIEW_MATRIX = INV_CAMERA_MATRIX * mat_world;\n";
 
 			//handle animation
-			code += "\tint particle_total_frames = particles_anim_h_frames * particles_anim_v_frames;\n";
-			code += "\tint particle_frame = int(INSTANCE_CUSTOM.z * float(particle_total_frames));\n";
-			code += "\tif (particles_anim_loop) particle_frame=clamp(particle_frame,0,particle_total_frames-1); else particle_frame=abs(particle_frame)%particle_total_frames;\n";
+			code += "\tfloat particle_total_frames = float(particles_anim_h_frames * particles_anim_v_frames);\n";
+			code += "\tfloat particle_frame = floor(INSTANCE_CUSTOM.z * float(particle_total_frames));\n";
+			code += "\tif (particles_anim_loop) particle_frame=clamp(particle_frame,0.0,particle_total_frames-1.0); else particle_frame=mod(particle_frame,float(particle_total_frames));\n";
 			code += "\tUV /= vec2(float(particles_anim_h_frames),float(particles_anim_v_frames));\n";
-			code += "\tUV += vec2(float(particle_frame % particles_anim_h_frames) / float(particles_anim_h_frames),float(particle_frame / particles_anim_h_frames) / float(particles_anim_v_frames));\n";
+			code += "\tUV += vec2(mod(particle_frame,float(particles_anim_h_frames)) / float(particles_anim_h_frames),particle_frame / float(particles_anim_h_frames) / float(particles_anim_v_frames));\n";
 		} break;
 	}