Big mistake to 7:th. This is real good but as you are looking for improvements. In CF-edit in the symbolset menu where you choose groundtexture. Beneth the groundtexture box there is a box called "tiles per meter" or something. You have probably got 1 there. I think it would be nicer if you had like 5 or even bigger. Then you could always change textures of the boulders.