How do montains?

[SystemCZ]

pls say me how do montain on map 

[cusoman]

Well, you could use the triangle method and create loads of brushes to create a good looking map, or you could use gensurf, a terrain editor for q2/q3 maps that makes semi realistic terrain.  You could mess with the parameters and make a good looking mountain that way.  Sorry i have lost the link for gensurf, but if you search it you'll come across a download link.
-Cusoman

[jitspoe]

Unless you mean mountains in the background, in which case you need to set the "sky" key in the worldspawn.