https://www.aboutcg.org/courseDetails/1234/introduce.
This course contains two practical cases, detailing how to use Marmoset Toolbag4's new real-time rendering, texture and baking tools with ray tracing technology to make more realistic and delicate textures and skin details.
https://www.artstation.com/artwork/VglzVZ
https://www.artstation.com/artwork/YedA5q