chefboss <chi### [at] manganese-bluecom> wrote:
> I might like to have the transparent matter behaving like in the real world,> to visualize some effects and therefore obeying the laws of nature.
I'm not really sure what is it that you are asking here.
The answer has already given to you: Photon mapping.
http://povray.org/documentation/view/3.6.1/424/
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- Warp