Organic and terrain levels

I'm looking for two kind of levels, organic (like some of the Quake 3 maps), and terrain (is it posible right? Using slopes make terrain maps like some of Team Arena levels).

Can someone help me?

Despite the prevalent use of slopes in recent ZDooM maps, there are hardly any maps that include complex terrain. One excellent map that takes advantage of terrain is Kurt Kessler's KZDooM7.

I started a map with some more-or-less advanced terrain architecture, but It never got finished.