Thanks throttlekitty. I don't use Maya unfortunately. I forgot to mention it earlier but I think I can guess how the set up is done. Any chance for a 3dmax set up? Especially how to clamp it to 0 to 1. I will try to see how I can do this in 3dsmax or Blender. The problem is the nodes type to multiply, subtract and clamp…
Search around youtube for "Blender procedural texture", there's a lot out there. One typical setup for me in Maya looks something like this to set up a procedural grunge mask. The top row mixes some noises for overall grunge, projects it to the geometry and adds them together. The bottom row uses projected noises to drive…