Thanks all! The Houdini terrain is an earlier effort, but really it just serves as a base for the modifications possible within TG to add fractal detail and make further shaped displacements. The "flattish" rocks are from Megascans, as well as a couple of populations of various other Megascan rocks. I think TG is still the best tool to detail out imported terrains and add 3rd party assets. I'm looking forward to trying out SSS with leaves and such.