
Several step by step tutorials with tricks, tips and hints on howto create such materials ranging from sometimes involving sculpting in a program like Zbrush and sometimes just using Photoshop.
This tutorial is about how I work with modular sets. I go through some tricks and stuff to avoid that I have learned when working a lot with these type of meshes.
This is a more step by step tutorial and some hints when it comes to more organic shaped meshes.