Thanks morne! The mountains definitely benefit from some really nice brushes, so Wilbur and I can't take all the credit The process is actually nothing particularly special and is mostly a collection of various techniques I've learned on here. If you're interested though I could detail it.

Regarding the river valleys, you're absolutely right. The final river incise step is probably a bit too strong, though if I draw in the rivers in blue it does an ok job of covering that up and allows me to be lazy and not have to experiment with different processes.

EDIT: Thanks for the rep! Just noticed that notification