advanced rendering for AutoCAD
I was messing with IVY generator ( http://graphics.uni-konstanz.de/~luft/ivy_generator/ ). It produces some really nice plants for external and internal use. I was unable to find out the way of USC treatment of .OBJ (Wavefront) files. I can import 3D model in Ivy just fine but the resulting plant has its own, out of place origin and random-like position. When inserted in Acad with Textured Mesh Object command, it appears on seemingly random place, rotated and mirrored. Maybe Roy could help with this. The result is more than worth trying, even with this inconvenience. Warning: it produces some really HUGE models :) so be careful when using it...
You can import a 3ds file into Acad.
May have beeter luck looking for a converter for a .sat file to .3ds and export the cad file to a sat.