> High!
> 
> clipka wrote:
> 
>> If you're using POV-Ray 3.7, try the diffuse backside illumination 
>> feature: Just add another float to the "diffuse" statement. This will 
>> have part of the illumination filter through to the other side 
>> (presuming that the rings are implemented as infinitely thin disks, 
>> otherwise you'd have to have radiosity enabled to make it work).
> 
> Sounds tempting... but does a version for Debian Linux already exist? 
> Otherwise, I will have to try it on my slow old Pentium III-933 which 
> runs Windows XP...
> 
> No, they are not disks (which would have no interior), but very thin 
> (200 metres) cylinders!
> 
> See you in Khyberspace!
> 
> Yadgar

The disk object DO have an interior, just like a plane.
Altough they have an interior, I realy don't know how a media contained 
"in" a disk would behave.



Alain

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