"Tim Attwood" <tim### [at] comcastnet> wrote in message
news:47cb2d98$1@news.povray.org...
> > Please tell me why this scene renders faster. You have changed quite a
bit
> > so I can't quite pinpoint it. I'd like to know as this ol' thinkpad
isn't
> > that fast.
>
> I think it's because I removed an extra union, POV can automatically
> split the bounding of objects in a union efficiently, resulting in fewer
> ray intersection tests against the bounding boxes. When you have
> unions inside of unions then you end up with extra bounding boxes.
>

And here I was worried about transparency slowing it down  :-S

Thanks.


--
- Nekar X -

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