Gumroad – Substance Masters Vol. 2
https://gumroad.com/l/shevW
This set focuses on teaching and showing the creation process of 4 advanced substance designer materials, you can dig into the full and commented source SBS substance designer files or you can watch the creation process in the 39 hours of recorded video, 4 hours of those are voice commented. For those interested in presentation you can check out the Marmoset Toolbag files that are included.