Rich:
I have only touched the surface of what 3rdPlanIt is capable of in 3D. I have experimented with the topography design elements but I didn’t go into a lot of depth and, to be honest, I got a bit bogged down trying to create visible mountains. I decided that showing the trees at various elevations was adequate for my purposes, but the program is capable of much, much more.
Also, because of some recent revisions, I haven’t gotten around to properly connecting all of the roads and the track in the helises yet.
Dave

