> Alain schrieb:
>> Sample showing the problem when you use irid with turbulence.
> 
> I didn't even see /that/ problem yet, but yes, that part is bogus, too: 
> The code is written in such a way that when turbulence is used...
> 
> (a) the effective turbulence "strength" is always 1.0
> (b) the value specified with the "turbulence" keyword instead multiplies 
> the thickness parameter
> 
> I guess that (a) causes the (apparent) angle-independence of the effect, 
> as the film thickness varies too much to see any influence of the light 
> direction, while (b) causes small turbulence values to kill the whole 
> iridescence effect (with the wrong side effect of greying out the whole 
> color).
> 
> 
> Man, that code is probably the crappiest part in all of POV-Ray.

I can agree with you. That peice of code is rotten to the core.

I think that this is a cese where you must recode the whole thing 
without regard to backware compatibility with older scenes.
Older scenes that do use the feature will probably benefit from the change.


Alain

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