Merge pull request #58808 from The-O-King/shader_state_blend_shapes

Fix shader state caching when blend shapes used

drivers/gles3/rasterizer_scene_gles3.cpp

@@ -1297,8 +1297,6 @@ void RasterizerSceneGLES3::_setup_geometry(RenderList::Element *e, const Transfo
 			if (s->blend_shapes.size() && e->instance->blend_values.size()) {
 				//blend shapes, use transform feedback
 				storage->mesh_render_blend_shapes(s, e->instance->blend_values.read().ptr());
-				//disable octahedral compression as the result of blend shapes is always uncompressed cartesian coordinates
-				state.scene_shader.set_conditional(SceneShaderGLES3::ENABLE_OCTAHEDRAL_COMPRESSION, false);
 				//rebind shader
 				state.scene_shader.bind();
 #ifdef DEBUG_ENABLED
@@ -2147,7 +2145,9 @@ void RasterizerSceneGLES3::_render_list(RenderList::Element **p_elements, int p_
 
 		state.scene_shader.set_conditional(SceneShaderGLES3::USE_PHYSICAL_LIGHT_ATTENUATION, storage->config.use_physical_light_attenuation);
 
-		bool octahedral_compression = e->instance->base_type != VS::INSTANCE_IMMEDIATE && ((RasterizerStorageGLES3::Surface *)e->geometry)->format & VisualServer::ArrayFormat::ARRAY_FLAG_USE_OCTAHEDRAL_COMPRESSION;
+		bool octahedral_compression = e->instance->base_type != VS::INSTANCE_IMMEDIATE &&
+				((RasterizerStorageGLES3::Surface *)e->geometry)->format & VisualServer::ArrayFormat::ARRAY_FLAG_USE_OCTAHEDRAL_COMPRESSION &&
+				!(((RasterizerStorageGLES3::Surface *)e->geometry)->blend_shapes.size() && e->instance->blend_values.size());
 		if (octahedral_compression != prev_octahedral_compression) {
 			state.scene_shader.set_conditional(SceneShaderGLES3::ENABLE_OCTAHEDRAL_COMPRESSION, octahedral_compression);
 			rebind = true;