Just a quick test using Nanite and Lumen for the first time.
A few environment designs in Blender and rendered in Cycles as I go through a variety of terrain generation methodologies. Promising results, quick setup, and fast to iterate. That being said, not the process I would adopt for future experiments. No simulation possibilities and not the easiest to port to other 3D DCC's.
These are some sample-sized Biomes I created while evaluating various 3D terrain generation tools. These are realtime, so I can revise anything with immediate updates, which is just an amazing way to work. These can all be easily Bridged to Unreal Engine's World Partition (previously World Composition) for Massive Open World experiences, or exported to most other 3D DCC's. Extremely quick and intuitive. I really enjoy the workflow with these.