Constant shader / Albedo diffuse output pass

need a way to output a constant from the shaders texture. just the raw diffuse color that has no lighting information in it. sometimes called a surface shader. this could also be an option in the output passes section where object/material ID's are. I just need a way for my textures not to be affected by lighting. flat shading self illumination don't quite work the way they are implemented now, because lighting affects them.