Pulled the geometry from an Irix demo, converted it with some home-brewed magic, and fixed the mesh. Printed great on a MakerBot Replicator 2 in PLA with 2 shells, supports. YMMV Have fun! I don't own the copyright to this logo, but as far as I can tell it hasn't been used in over a decade. If this is incorrect, please contact me! I've wanted a 3D SGI logo forever, now you can have one too. Update: including pre-sliced X3G file for Replicator 2 printers. Takes about 8 hours to print. Cube is same size as in STL.