Here is an exercise on creating a modular parts from scratch and integrating it into Unreal Engine. I used Star Wars Jedi: Fallen Order as a reference for the shape of various rocks. I started by sculpting some props on Zbrush. I textured them in Substance Painter, taking care to create mask variations for use in Unreal Engine with double UV channels workflow. I ensured that the color and masks could be adjusted and operated through the material instance parameters. I chose to work with a texel density of 512p/m. The only thing I had help with from Quixel Megascan was creating the mountain background. Hope you'll like it 🤟