Have you tried in cryengine? its quite easy to generate a terrain, and then you can export as obj.
Hope it helps. Francisco. On Tuesday, November 19, 2013, Doeke Wartena wrote: > hi, > > i'm working on a hl2 map where i need to make some cliffs. I really > dislike how this works in hl2. So i thought maybe make it in xsi and > program a converter that tries to get a close result to the xsi version. > Anyway, how would you make a cliff in xsi? One way could be a grid with a > displacement driffen by a weightmap. > But i'm sure there are tons of other ways. > > please let me know. >

