Does anybody know how to modify the Unity 5.6 built-in UI shaders so that they can receive shadows from 3D objects? My game has a score card in the background created from Text and Image objects and CanvasRenderers. These UI elements are rendered behind 3D objects by setting the Render Mode of the Canvas to Screen Space - Camera. I want these 3D objects to cast shadows onto the UI elements. Is this possible? Thanks!