This animation of a stirling engine (2841 frames, sound, 4.8 MByte) is one weeks work and a birthday present in 1993 for a colleague of mine, Thomas. As of today, Thomas has his own company manufacturing Stirling engines and other projects.
Note: The animation file is currently not available, sorry.
The animation path was done with my previewer rshow for the Radiance raytracer, the rendering itself was done with the Rayshade raytracer, which addedd motion blurr easily. The films were rendered with PAL resolution (768x576 pixel) in 1993 on 25 UNIX HP7xx workstations in parallel, then single frame recorded on a SONY Laserdisc LVR6000 using the SGI VideoLab hardware and transferred to VHS-S tape. It was finished in time: 2 hours before the birthday breakfast.
Special thanks to FhG-ISE for sparing a few CPU cycles (on the Hewlett-Packard PA-RISC maschines in those days).
Mplex's analysis of this stream is available, as well as SGI's dmconvert output.