If you go to:
http://www.vislab.usyd.edu.au/sidefx/
you can download a "personal" version of Houdini, the software the Rhythm & Hues uses, that was used in parts of Spirderman, and parts of "The Sums of all our Fears"...and the M&Ms characters. Plus, by following the links, you can get tutorials in pdf format.
And if not, you can at least download their propaganda reel:
http://www.vislab.usyd.edu.au/sidefx...Ireelsmall.mov
Oh, yeah...it's a Windows program.
My Best,
-g-
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