Sure, we had a number of people at the NYC show, come up to the booth to
order InterChange, so they could use the Terrain module with Sculpt, or
other programs. Keep in mind that it's easy to exceed the memory capacity
of your machine with any of the 3D programs, making big trianglebased
terrains.
I have already had that problem. I tried to make a billboard with floating
letters using Interfont and SA3D, and very quickly ran out of memory. I
think I can only render the thing in TINY mode; not even worth it. Imagine
if I had tried to add a terrain BG to the picture!