Wowsers. I have no idea if this will help on a high-performance cluster, but I do 3D on my regular old i686s with either POVray:
http://www.povray.org/
POVray has a modeler front-end that comes bundled with KDE, called KPOVmodeler. Easy as anything to learn, and you can still use POVray from the command line.
and Blender:
http://www.blender3d.org/cms/Home.2.0.html
Blender is a full up animation studio. Recently used to make a movie, even!
and there's also Maya 3D ported to Linux:
http://usa.autodesk.com/adsk/servlet...112&id=6933692
And here's a whole slurp of Linux 3D graphics links:
http://loll.sourceforge.net/linux/li...3D_/index.html
HTH
