Merge pull request #111578 from Kaleb-Reid/fix-shadow-cull-material

Use correct shadow material in some cases in Mobile

Author: Repiteo

servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.h

@@ -296,7 +296,8 @@ 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 && !wireframe && !stencil_enabled;
+			bool backface_culling = cull_mode == RS::CULL_MODE_BACK;
+			return !uses_particle_trails && !writes_modelview_or_projection && !uses_vertex && !uses_discard && !uses_depth_prepass_alpha && !uses_alpha_clip && !uses_alpha_antialiasing && !uses_point_size && !uses_world_coordinates && !wireframe && !stencil_enabled && backface_culling;
 		}
 
 		virtual void set_code(const String &p_Code);