I have started mapping HL and have made some rooms and such that worked, however. I haven't figured the sky box thing out yet and haven't found good info. on it. Also I noticed compiling a map with a room bigger than about 4000 units doesn't compile (max leafs error), so how did you make such big maps ? Did you also make your models smaller and how exactly, I know some coding also if you could explain. Thanks a lot if you can help...