Maybe because planes are bounded larger?   I never really compared them, but
that's my guess.

-Mike

Nieminen Mika wrote:

> Peter Santo <san### [at] poolinformatikrwth-aachende> wrote:
> : maybe "half-space"? BTW, would a very big box render faster than a plane
> : or vice versa?
>
>   I have always noticed, that planes are strangely slow to render, while
> boxes are much faster, and I have always wondered why. In a box, you have to
> test the intersection with 8 sides while in a plane you have to test the
> intersection with just one side. If you make 50 big boxes it surely will
> render faster than 50 planes.
>   Can anyone explain why is this?
>
> --
> main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
> ):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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