I am embarrassed by such things, too, so for real terrains, I use an ordinary modeler program. But such terrains are polygon-intensive, are not editable in Vue's terrain editor. The only way I found, to adjust a Vue terrain for example around building or such, was, to take a top-view render of the terrain, with houses, trees and so, load that into Photoshop, so I see who/what is where, crop that and keep only the terrain's representation, paint on a overlaid layer the areas I want to rise, (on an other one those I want to lower,) save those layers each, without the colour image, and then, in Vue's terrain editor, add these images to a duplicata of the existing terrain, using very low percentage. I draw that black/grey on white, so for raising, invert to negative. I never hit the ok-jackpot at the first try... Perhaps there are easier and more exact ways to do that ?