This mpeg-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. This guy has meanwhile his own company manufacturing Stirling engines.
The animation path was done with my extension rshow radiance raytracer, the rendering with the rayshade raytracer, which adds motion blurr and has a previewer for SGI workstations. The films were rendered on 25 HP7xx workstations in parallel and single frame recorded on a SONY Laserdisc LVR6000 using the SGI VideoLab hardware. 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).