Basically, I'm trying to understand how to generate a procedural mask. I'm trying to make an eye and I wanted a mask to make a difference between cornea and sclera, but the problem that I have is that I don't understand any of this as my eye ball just goes from solid white to solid black.
I can't seem to find or locate anything to make this mask for my eye.
How do people use these nodes to generate masks on objects? I really don't understand them.