Attached Link: http://www.cise.ufl.edu/submit/files/file_020f70fe71888f602530143e2e326be2.pdf

Poser's "smooth polygons" converts polygons to bezier patches at render time. Do a search for "pn triangles", that should give you pointers in the right direction. I noticed that in Hexagon 2.5 you can select "bezier interpolation" as smoothing operator, which comes reasonably close. That could be of help when modeling content for Poser.