Procedural Tear & Wear / Imperfection Using Bevel Shader

glitchi writes:

We will be using a Bevel Shader that comes with Blender Cycles to generate a tear and wear imperfection mask. “Wait a minute! Bevel Shader only generates normal information!” — you say, and that’s exactly right! BUT we will force it to do what we want it to do, using short node setup to do so.