I need to apply some custom effect for the background entity.
I tried to use SceneDelegateRenderer for draw a PrimitiveQuad, but if I put it on Master (compositor.Master.Renderers.Add(renderer) as last item - it visible only custom effect without another elements of the scene,
and if I put as first item(compositor.Master.Renderers.Insert(0,renderer) it visible only another scene without background.
Please describe a technique how to use custom effect for the background entity. Maybe I did not understand renderer layers.