I was just now goofing around with "GeoControl" -- making a cityscape kind of terrain.  I imported to Vue as a tga height image, then built a procedural terrain based on it.  It's a quick & dirty creation (~15 minutes in Vue), and not intended at all to compete with "Dystopia!"  However it shows what you can do with terrain structures.

BTW, by increasing "noise" in "GeoControl" one can make massive city scapes -- good for distance skylines.