How to create a visible material that does not emit or reflect light? I need to make a plane in the background that is independent of any lighting in the scene. This means that it does not emit light, and it does not reflect light, but it is visible. It is so I can create a green screen.
For Blender Internal, on your material, check Shadeless.



edit:

If you're using Cycles, open your material in the node editor, and set up this for a green screen:
Basically this tells the material to only interact with the camera, and no other rays.