Use light as mask?

#1

Is there a way to use a light as a dynamic mask? Id like to use a light to reveal different materials that make up a vray blend material.

Thanks!

#2

I’m sure someone will figure out how to make maya do it, but I’d probably do it with 2 passes of each material and then a light pass on a simple material. That way you can make adjustments to the transition that you wouldn’t be able to if directly rendered.

#3

The surface luminance node is kind of doing what I want but its a little hard to cont