make
a brush entirely surrounding your map and hit
the hollow key. deselect.
No offence but this is a sloppy way of doing it there is known problems with this.
Just create each brush one at a time and it will save you trouble later.
Hi, I'm new to mapping. I have downloaded the original omaha.map, and I've seen that certain terrain parts are hidden when i play the map, but are shown in MOHRadiant. It is done by putting vis textures? Thanks in advance
when you have lod terrain, select it, hit SHIFT+F (or go to lod terrain -> edit facet flags). a box comes up, you select delete. now you select each triangle you want to remove, the way you select a brush's side (CTRL + SHIFT + click). then you click done.