Ensure shadow material and mesh are not used with wireframe mode

doc/classes/RenderingServer.xml

@@ -3314,7 +3314,8 @@
 			<return type="void" />
 			<param index="0" name="generate" type="bool" />
 			<description>
-				This method is currently unimplemented and does nothing if called with [param generate] set to [code]true[/code].
+				If [param generate] is [code]true[/code], generates debug wireframes for all meshes that are loaded when using the Compatibility renderer. By default, the engine does not generate debug wireframes at runtime, since they slow down loading of assets and take up VRAM.
+				[b]Note:[/b] You must call this method before loading any meshes when using the Compatibility renderer, otherwise wireframes will not be used.
 			</description>
 		</method>
 		<method name="set_default_clear_color">
@@ -5047,6 +5048,7 @@
 		</constant>
 		<constant name="VIEWPORT_DEBUG_DRAW_WIREFRAME" value="4" enum="ViewportDebugDraw">
 			Debug draw draws objects in wireframe.
+			[b]Note:[/b] [method set_debug_generate_wireframes] must be called before loading any meshes for wireframes to be visible when using the Compatibility renderer.
 		</constant>
 		<constant name="VIEWPORT_DEBUG_DRAW_NORMAL_BUFFER" value="5" enum="ViewportDebugDraw">
 			Normal buffer is drawn instead of regular scene so you can see the per-pixel normals that will be used by post-processing effects.

doc/classes/Viewport.xml

@@ -555,6 +555,7 @@
 		</constant>
 		<constant name="DEBUG_DRAW_WIREFRAME" value="4" enum="DebugDraw">
 			Objects are displayed as wireframe models.
+			[b]Note:[/b] [method RenderingServer.set_debug_generate_wireframes] must be called before loading any meshes for wireframes to be visible when using the Compatibility renderer.
 		</constant>
 		<constant name="DEBUG_DRAW_NORMAL_BUFFER" value="5" enum="DebugDraw">
 			Objects are displayed without lighting information and their textures replaced by normal mapping.

drivers/gles3/rasterizer_scene_gles3.cpp

@@ -238,7 +238,7 @@ void RasterizerSceneGLES3::_geometry_instance_add_surface_with_material(Geometry
 
 	GLES3::SceneMaterialData *material_shadow = nullptr;
 	void *surface_shadow = nullptr;
-	if (!p_material->shader_data->uses_particle_trails && !p_material->shader_data->writes_modelview_or_projection && !p_material->shader_data->uses_vertex && !p_material->shader_data->uses_discard && !p_material->shader_data->uses_depth_prepass_alpha && !p_material->shader_data->uses_alpha_clip && !p_material->shader_data->uses_world_coordinates) {
+	if (!p_material->shader_data->uses_particle_trails && !p_material->shader_data->writes_modelview_or_projection && !p_material->shader_data->uses_vertex && !p_material->shader_data->uses_discard && !p_material->shader_data->uses_depth_prepass_alpha && !p_material->shader_data->uses_alpha_clip && !p_material->shader_data->uses_world_coordinates && !p_material->shader_data->wireframe) {
 		flags |= GeometryInstanceSurface::FLAG_USES_SHARED_SHADOW_MATERIAL;
 		material_shadow = static_cast<GLES3::SceneMaterialData *>(GLES3::MaterialStorage::get_singleton()->material_get_data(scene_globals.default_material, RS::SHADER_SPATIAL));
 
@@ -3157,7 +3157,7 @@ void RasterizerSceneGLES3::_render_list_template(RenderListParameters *p_params,
 			}
 
 			bool use_wireframe = false;
-			if (p_params->force_wireframe) {
+			if (p_params->force_wireframe || shader->wireframe) {
 				GLuint wireframe_index_array_gl = mesh_storage->mesh_surface_get_index_buffer_wireframe(mesh_surface);
 				if (wireframe_index_array_gl) {
 					index_array_gl = wireframe_index_array_gl;

servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.h

@@ -273,7 +273,7 @@ class SceneShaderForwardClustered {
 
 		_FORCE_INLINE_ bool uses_shared_shadow_material() const {
 			bool backface_culling = cull_mode == CULL_BACK;
-			return !uses_particle_trails && !writes_modelview_or_projection && !uses_vertex && !uses_position && !uses_discard && !uses_depth_prepass_alpha && !uses_alpha_clip && !uses_alpha_antialiasing && backface_culling && !uses_point_size && !uses_world_coordinates;
+			return !uses_particle_trails && !writes_modelview_or_projection && !uses_vertex && !uses_position && !uses_discard && !uses_depth_prepass_alpha && !uses_alpha_clip && !uses_alpha_antialiasing && backface_culling && !uses_point_size && !uses_world_coordinates && !wireframe;
 		}
 
 		virtual void set_code(const String &p_Code);

servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.h

@@ -243,7 +243,7 @@ class SceneShaderForwardMobile {
 		}
 
 		_FORCE_INLINE_ bool uses_shared_shadow_material() const {
-			return !uses_particle_trails && !writes_modelview_or_projection && !uses_vertex && !uses_discard && !uses_depth_prepass_alpha && !uses_alpha_clip && !uses_alpha_antialiasing && !uses_world_coordinates;
+			return !uses_particle_trails && !writes_modelview_or_projection && !uses_vertex && !uses_discard && !uses_depth_prepass_alpha && !uses_alpha_clip && !uses_alpha_antialiasing && !uses_world_coordinates && !wireframe;
 		}
 
 		virtual void set_code(const String &p_Code);