Thank you very much! Seemingly, I just couldn't fnd the right node. I do seem to have a problem, though. My base image is two-color black and white, with a blender node and a procedural setting on Input_1(which is black on the imagemap), but if I can't get rid of this weird pixellated patchyness in Input_2. It does it regardless of what's set there (from imagemap to reflection) or what body part it's assigned to, and doesn't seem to do it at all on Input_1. This image is the end result. (ignore the SkinScalp mat)