Your stuff kinda reminds me off Chris Bishops stuff: http://www.chrisbishop.com/fineart/ but no idea why, cool stuff I need to grab some paints sometime soon
As @Neox said, if you're using normal maps, you really should not need to do anything special like transferring custom normals or other convoluted workflows. Make sure: * Your triangulation matches between modeling app, baker, and target engine * Your tangent space matches between all apps (generally this is Mikktspace…
Just plug the output of your function into the alpha input on a blend node. You could use a Linear Interpolate or one of the material blend nodes like MatLayerBlendSimple if you want to blend a whole material at once.