https://gamesartist.co.uk/discov-mountains-env-jura-andreev/
Jura Andreev, 3D Environment Artist has created these beautiful mountains using a mix of Megascans and his own work, inspired by Tomb Raider and Uncharted using UE4. In this article he talks about, ref, insp, blockout, sculpting, textures and mats, blending, pom decals, world-aligned snow, foliage, wind, lighting & post-process.
https://www.artstation.com/artwork/r9zD05
https://www.artstation.com/jurassik