Thank you both for the fast reply!
I will surely try as soon as possible!
;-)
Paolo

> "Sebastian H." wrote
> The effect you are looking for is called caustics.
> Look in the docs for Photons.
> They're shot into the scene and can accumulate in
> bright spots (caustics) when diffracted by glass,
> water or something.
> Just active photons for your light source (docs!)
> this should do the trick.
>
> Sebastian

> "Tim Nikias" wrote
> In a case like this one, looking for the "caustics" keyword might be worth
> it. It's faster, but less precise (caustics will only appear in the
original
> shadow of the object, whereas photons can get reflected and are properly
> refracted. But for this scene, this might not matter that much.
>
> Regards,
> Tim

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