Hi,
I must write an CD effect shader, that will produce this rainbow-like 
effect observed on CD disc. I guess it is hard to implement, today only 
few renderers do support it (Maya and/or Cienema 4D AFAIR).

Maybe someone can give me some hints/suggestions?

If I will succeed in writting it for my company, I'll probably spend some 
time to port it as PovRay plugin (in fact I will have to write it again 
from scratch due to licence ;)

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