just one observation - interior{I_GLASS} ?

"Warp" <war### [at] tagpovrayorg> wrote in message 
news:46c74014@news.povray.org...
> chefboss <chi### [at] manganese-bluecom> wrote:
>> Besides the suggested photon-mapping, although working better, brought me 
>> to
>> the next problem: speckled appearance of the transmitted light when ior
>> gives focal-point near the surface of the sphere, see 2 or 3 threads 
>> above,
>
>  Then you have to fine-tune the photon settings. Start by increasing the
> photon count to see if it helps.
>
> -- 
>                                                          - Warp

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