>> //faked caustics
>> #local PIMAGE = function {pigment{image_map {sys "Caus.bmp" interpolate
>> 2}rotate x*90 scale 10}}
>> plane{y 0 pigment{function{PIMAGE(x,y,z).gray} colour_map{[0 rgbt 0][1 
>> rgbt
>> 2]}}   translate y*8.141 hollow no_image no_reflection}
>>
> For this, you can use the caustics keyword in your interior. Way faster 
> than using photons, only dependent on normals/shape, independent from 
> distance, only affect area inside the "shadow" area, no reflection 
> caustics.
> Perfect in your case.
>>
>> -tgq
>>
>>
>
>
> -- 
> Alain

Actually, I did have caustics on before, but I could not get them to give 
the desired results, so I reverted to the filter method.

-tgq

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