You all might not be aware, but there are holes in the terrain where caves used to be and such. If you havent already, place a large object over them so that you dont have ugly holes for no reason mucking up the place. Just fyi.
Equally, when adding new bunkers and caves etc, you should edit the .trn to make a new hole in the surface shaders to avoid seeing the existing terrain as you enter (especially on caves), and remove the radial flora from around the entrance otherwise it'll look cheap n nasty as you enter.
Looks like another guide coming up then, if folks are interested that is