[Genma Saotome]

Goku, please consider adding some sort of visual aid to represent the area subject to terrain lofting. A semi-transparent, colored circle. It's extremely hard to carefully limit the edit when you cannot see where the boundary is.

Oh... second thought: It would be very useful to be able to choose different polygons to limit the scope. Taking the present polygon as the default, it has a diameter and a depth/height at the center, forming a dish; If you added a square (and/or rectangle) as another choice with attributes of rotation, depth/height, which side is lower / opposite side is higher we'd have a full, even slope to use. maybe a triangle would be better... I dunno. I think there is real utility in this idea... something for you to think about.