I was inspired by the very talk that got me into Designer, Daniel Thiger's 2018 GDC talk, to do a study. He spoke in the talk about how he copied Megascans for fun and used them as examples to get real life details in Materials. I did a quick study of this cool Black Sandy Gravel, and I have to say, he's right. More of these little exercises likely to come in the future :) Enjoy!
100% Substance Designer