I was experimenting with a scene with an object that is unwrapped so that every polygon has the same texture so that I can use it as a wireframe. The object is sitting on a plane. I tried this node setup, but it is not as I expected, because for some reason the main material casts light.
Here is what I want to achieve: the wireframe should be a light source that doesn't cast light. By the way, there is no other light source in the scene that is lighting the object.
However, it works this way:
However, in this way only the wireframe of the object is visible. How can I make the wireframe only to be a light source and not to cast any light?
If I confused anybody, then this is what I mean: http://cgcookie.com/blender/2011/10/20/blender-tip-creating-invisible-lights-in-cycles/