I made a library of nodes to generate landscape, recently I was able to make a particle erosion node to simulate natural erosion of real mountains.
Everything you see here was created using Geometry/Shader nodes, from the height map to the snow falling down the slope, no external work needed. The tree generating tool is a different node library but also made of Geometry nodes.
Here are some other tests using the same system
The trails of water were created by the erosion simulation, I didn’t create them manually.
A landscape can be made with just a few nodes:
From left to right: Create a blank landscape → Simple displacement → Erosion simulation → Bake → Clean up the attributes and assign a material → Done
If you are interested in getting your hands on my landscape node library, I had it up for sale here: