Hi Fuzzy

> shadows I did notice were rough... as for 'deep' holes, I'm not sure I know
> what you mean, as I mapped my texture to an outer cylinder and to an inner
> one, the holes gained depth from the distance between the two cylinders.

> When I tried the CSG without assigning a texture to the cylinders making the
> holes the holes just turned out black, so I assigned rgbt <1,1,1,1> to the
> smaller cylinders... and since I'm using Polished_Chrome on the main
> cylinder... this might not be a good idea.

A very bad idea:
- Your holes have no walls (like the yellow parts in my example code)
- You can look between inner and outer cylinder and will see the inside of
  the outer cylinder and the outside of the inner cylinder through the
  hole. There will be unexpected shadows and reflections due to the missing
  walls.
- With a highly reflective texture, some rays will be reflected (almost)
  endlessly between inner and outer cylinder.

> What I'll try first, as someone suggested, is to have shorter cylinders that
> ONLY punch out the hole, and that don't cross over in the middle to punch
> out the opposing hole on the other side too - my guess is that the crossing
> over of them is throwing things off somewhere...

NoNoNo! My example renders in 2 min 18 sec with crossed cylinders, but
needs more than *twice* the time (4 min 39 sec) with one cylinder per hole!

> >    FIVE THOUSAND holes. They required less than 26 MINUTES for 640*480
>
> then it's obvious that I'm doing something very wrong (hopefully) :)

It works, so it's not wrong. But it's bad and can be done better: play
with my code (my complete last post is a ready-to-go POV-Ray scene)!

> *looks around at the POVray swimming pool... maybe I should have tried to
> climb in down at the shallow end instead of jumping in here... ah well...
> too late now* ;)

... you can't (learn to) swim at the shallow side ...


   Sputnik

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