Camera mapping, self illumination, matte material

[z_farm]

So I have a situation where Im rendering part of my scene then wanting to project it back onto my geo.. but I can't find a material/map that will let me just have straight 1 to 1 pixel color.. ie if my map has a pixel that is 128,128,128 I get that value back in my render regardless of the light, shadow...... I've done my homework.. and can't find much, my Google skills must be slipping

thanks

This is a wip..I just need to project this and get it back in the rener