create your own DEM check out the sandbox tools in SU, search Help for Stamp , Pro version only, then reopen model with Google SU .....

want to correct smooth out ground elevations, here is one way .....


use GEv4 to view this texture model




explode arch, circles, and drag vertexes or lines about with move tool

working from a 3d perspective point of view seems to make the moves easier.

move every other point , or every other line as you rotate around the model.

on the second pass of rotating around move the vertexes, lines that were skipped on the first pass

watch out for points clamped to origin elevation if elevating , such as the sections in this model that are missing surfaces


kinda neat .....