> > <sighs> Now you tell me. Ah well, it's done now
>
> Photon mapping simulates light refracting through transparent or
> reflecting off reflective objects onto other surfaces...if you don't
> have anything for them to show up on, you are just wasting time shooting
> photons. All of the surfaces in this image appear to be either
> transparent or reflective, with nothing for the caustics to have much of
> an effect on.
>
It does have some effect on more complex items, such as hollow objects with
glass objects inside, doesn't it?

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