I’ve got some good news and bad (less good?) news. In the portrait course I’m recording I teach procedural clothing / fabric creation in detail:
There’s only one caveat: The procedural weave pattern I created myself and will be part of the course source files as a node group. BUT I…well…still don’t understand the math that goes into generating the pattern 😅 I was able to piece it together well enough based on Simon Thommes’ course and this video from Erindale. However I regrettably don’t understand the math enough to teach it myself. This is the weave pattern node network ONLY 😳 :

With that said, I teach everything else about the material in-depth: Coloration, soft effect via fresnel, adding fuzz particle system.
Maybe this part of the course will be perfect for you!