It looks nice, but I think you could add more steepnes though. I like to use the flat brush with custom shapes such as hills and cut through the terrain, that maintains the hills but keeps the shapes interesting by adding sudden drops.


Also, from what I can see, your angles for rocks are too shallow, I would keep angles from 0-40 free of rocks if possible, unless you want to cause an effect of erosion in a tall mountain.

Looks great! 8/10!