Attached Link: http://www.silverblades-suitcase.com

Hm, depends what you are eventually wishing but... Why not make a small base for the prominent buildings, generally buildings sit on a platform of some type. Make a grey scale image in 2d application, 1st layer a medium grey, then make a circle with a much lighter grey, then apply a gaussian blur. So you get a blurred circle. Aplly this to a terrain, adjust terrains clipping, materials and height/size to suit. Would that do what you wish? :)

"I'd rather be a Fool who believes in Dragons, Than a King who believes in Nothing!" www.silverblades-suitcase.com
Free tutorials, Vue & Bryce materials, Bryce Skies, models, D&D items, stories.
Tutorials on Poser imports to Vue/Bryce, Postwork, Vue rendering/lighting, etc etc!