Since a few months Megascans has become free for Unreal Engine 4 users, for this occasion and with this course learn how to create a step-by-step standard shader for Quixel Megascans.
You will be able to apply this material to any rocks, branches, trunks, stumps, debris, mushrooms, assemblages but also any other 3d models available in the library (except "Plants" type models).