Best Of

I figured it out for the most part. Could still use some work on the blending procedure. The masks don't quite work the way I want them to but it's good enough for now. I want a height blend effect on things lower than the brick surface but also I want plaster to cover the bricks at a certain point. And where there's a brick partially covered, I want a realistic transition rather than a gradient.

Anyways, I made it into a MF so I can re-use it. It takes a single vertex color, 0 to 1, splits the range up by the number of materials you have (expressed as MAs) and blends with an opacity based on your position within the range. If your VC color is 0.15 and you have 4 MAs, then it selects the first (bottom layer) MA and blends it at 0.6 opacity with the next layer. It also has masks so you can get a more natural blends. And you still have two (or three) whole VC channels to use for other stuff!