Hello,
I'm a 3D Artist & Game Developer, worked with Unity for over a decade, now getting to know Unreal Engine, and Houdini Engine as well.
Here's a current work in progress on generating Landscapes, fully procedural. The cliffs & rocks are created as meshes displaced from the terrain.
Still getting a handle on everything I want generate (trees, rocks, props), have a ways to go and much to learn!