> now, from what I've read, it takes more than a thousand iterations to get good
> results, but trying to do just fifty iterations makes POV do an imitation of
> PAC-Man with my memory and swap space.  All 16GB of it.
>
> I don't know if this is a bug or a natural limitation of the geometry parsing
> engine.

It looks to me like at each iteration you are doubling the number of 
objects POV has in memory (by creating an intersection of two versions 
of the previous object). That means after 50 iterations you will have 
about 2^50 objects - I'm surprised you got that far!

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