Warp wrote:
> 
>   Have you tested if there's any difference in render time between putting
> all those 1000 rectangles into a union or separately in the scene?
>   Povray may be able to make some bounding box optimizations with unions,
> but I may remember wrong.
> 

The rectangles are already structured in unions. 

I tested different arrangements concerning this point (larger/smaller
blocks of rectangles) and there was only small difference in memory use,
but time was the same (+/- 1 sec)

Christoph

--
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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