helge_h nous apporta ses lumieres en ce 2005-02-22 18:37:
> Just boxes, cylinders, toruses and spheres, nothing else. The window area
> takes longer to render than the rest, probably due to some inefficient
> difference operations. Would it be better to subtract the cut-outs from
> each elementary shape rather than one big union group from another big one?
You can try various options and see what works best.
> 
> Work-in-progress, for a larger image I am making. I will use a number of
> these cars, all of them seen from a distance so they don't need too much
> detail. Does anything look weird? Comments are welcome.
> 
> H
> 
> 
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> 
The hood looks a little to boxy. The front end seems to extent to much past the front
wheels, in 
that era, the front bumper was just clearing the front wheels.
It's normal that the windows take more time than the rest, transparency + reflection,
plus you see 
the interior details and alsi, I presume, reflections. You may try using one object to
cut off the 
holes for both sides at once, one for the front side windows, one for the back sides.
If the cars are far away, you may possibly remove the glass and gain some little time.

Alain

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