Does someone know of a technique to import a terrain that has a slope to it and buildings and vertical details etc. but add thickness not along the normal using inner or outer thickness but along a negative Z axis only. So you could make a skirt for the terrain and 3d print in 1 go. I've messed with making a large volume and trying to intersect the two volumes to get just a fill under the terrain but it's not as easy as it seems. Any idears?
Much appreciated!
Jason