Graphics

I have a 3D object (simple cube for testing material bake from C4D) in my scene, with an image quad behind it. I added a spotlight, and can see the effect of the light on the background image, but not on the 3D box in front of it. Any ideas why an object will not accept light? The light is on in the bindings tab.

There is a limit of 6 lights that can affect any object; is there more than 6 lights bound to the cube?