#Modify
Last time I used wavefront, there were 3 types of patches. I think it was
version 2.3 or something like that, 2.something anyway. There was a
B-Spline Patch, Cardinal Patch, and Bezier patch. I'm not exactly sure
what the differences were, something in the tension of the splines. I don't
think that 3DS can do ANY of these, at least not in the 3d editor. In the
shaper and lofter, I think it does the spline one, although you can modify
the curves much easier in the shaper anyway, so it doesn't really matter
which kind they are.
Aaron