.Map :: MoHAA Mapping

How do you make those tree borders that you see around the perimeter of maps like Destroyed Village?

Use a couple of brushes with the nodraw texture (or patch meshes) and give them a foliage texture only on the front face (hint: type 'foliage' in the texture search box). Create multiple layers this way (about two should suffice). Later add static -> bush -> regularbush models everywhere (use a scale of about 4) and finally plant some trees, don't use more than necessary.