First post here, and of course it's a plea for help. I desparately need some advice. I'm currently working in Maya and trying to master the layered shader material. I'm building a scene with a road (10 polys wide 100 polys long as a segment). What I did was break the road down into 10x10 units and normalized the UV's so I could have a repeating texture. Right now I have 2 layers; one for the asphalt and another for the divider lines. These 2 layers look fine, they repeat well and everything is dandy.
The question I have is; how do I go about adding an additional layer to add cracks, tar patches or other deformations in the texture that I don't want repeated. I'm not sure where to even start. A gentle 'nudge' in the right direction is really all I need, but feel free to 'shove'.
The only thing I can think of is to take one of the 10X10 segments, duplicate the layered shader, apply the additional deformed layer on the duplicated shader and re-apply to the individual segment. This seems counter intuitive though and I suspect that I should be able to knock out all additional textures in one single texture file and apply that to a different UV set maybe? Not sure how I'd go about that.