I have not measured anuthing, so I cannot say for definite, but try to
raytrace a nice scene (reasonably complex) first without textures and then
with nice textures (some layered). I bet you are going to see a huge
difference. In the first one you most probably had 95% to 100% intersection
testing, in the second one chances are you had much less than 30%
intersection testing.

I have noticed that some of the nice textures are very floating point
intensive, and you can explain that very easily if you use turbulence.

That's only what I think, but I don't thn=ink I'm far off.
Al.


Jamis Buck wrote:

> In general, ray-tracers spend up to 90% of their time performing
> intersection tests.  I know POV is very optimized, but I would be
> surprised if it still didn't spend most of its time doing intersections.
>

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