#6009: RenderableSurfaces with invisible shaders don't attach themsel…

…ves to any shader

This includes the shared wireframe shader that is always visible, surfaces
must be prevented from adding their geometry to any shader.

radiantcore/model/ModelNodeBase.cpp

@@ -87,8 +87,9 @@ void ModelNodeBase::attachToShaders()
     {
         auto shader = renderSystem->capture(surface->getSurface().getActiveMaterial());
 
-        // Skip filtered materials
-        //TODO if (!shader->isVisible()) continue;
+        // Skip filtered materials - the wireframe shader itself is always visible
+        // so filtered surfaces need to be kept from attaching their geometry
+        if (!shader->isVisible()) continue;
 
         // Solid mode
         surface->attachToShader(shader);