Ok, i opened it, the mountains were fine, but after experimenting in mission editor, i came up with 3 suggestions:
1. IMO it looks much better with a different grass texture
Normal:
My editted:
2: You may want to put some rocks in bunches insted of on their own.
3: There are some horribly bulgy mountains on one part :Þ (I dunno if this was fixed in v4?)
Hope that helps ;D