If I understand you correctly, you want something in your scene that 
blocks other objects, therefore only showing the background?

If you're using a solid color background, you could always use a texture 
like

texture {
	pigment { SomeColor }
	finish { ambient 1 diffuse 0 }
}

on any object. add no_shadow and no_reflection to the object, so it 
won't show in reflections and won't create any shadows.

HTH,
Florian

Post a reply to this message