@surabax correction (memory glitch), they were already running on Irix when I joined Nichimen, I ported them to OpenGL on Irix and then onto Windows NT which was the master plan. Btw, the same company made a separate modeler in C++ called Nendo which operated the same way (on the same winged-edge data structures) as Geometry as part of some deal we had with Sun and then later released on Windows, and that inspired someone to make an open source version in Erlang (of all things) called Wings which you can still use.