It's about as simple as can be.  Basically each machine creates a
"flag-file" in a shared directory to claim a frame for rendering.  If a
given frame has already been flagged by another machine, a blank frame is
rendered.  If compressed, blank frames should be tiny and easy to sort out
(the caveat of this approach.)

Comments?

Charles

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Attachments:
Download 'simplenetanimator.pov.txt' (7 KB)

Note that if rendering with multiple instances of POV-Ray on a single
machine, it's important to put the output files in a separate directory
(adding a +o[dirname] to the command line).  Otherwise the trailing
instance of POV-Ray will overwrite each good frame with a blank one.

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