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I just manage to have a similar result with Scatering and specular but it's very very long to converge.

Some phenomena are just not viable for GPU bruteforce rendering. The tests here looks nice, but are still very noisy for the render time spent on a ~1000USD piece of hardware... Converging to a clear (production quality) solution would take exponentially more time.

Gabriele what is Participating Media? and what does that have to do with volumetric caustics?

Nildo

Participating media means Medium I think
check this : http://render.otoy.com/forum/viewtopic.php?f=21&t=9380

Karba could you please explain how you did this? or upload the scene? I've spent literally ~10 hours now trying to achieve this effect and I'm getting nowhere...

If you can;t do neither maybe at least settings? - sun power, unit system, how big is the water, is the water a volume, is camera underneath the volume or inside it?, is there volume within a volume?(one for water one for sss), is this 2 seperate renders?(one for rays, one for ambient water), what is the setting on the translucent material?, what is the setting on medium node?, what is the setting on schlick parameter?

I would be really grateful if you could either answer these questions or simply post the scene...

Thank you.

+1111 scene
Сцена не помешает, лучше выкладывать подобное. Народ не шарит как такое создать

Okay after about 15 hours of straight trying, I have managed to come to a result looking similar to Karba's, albeit from a different angle.

I might post my scene after I do some more tweaking if anyone wants it

@Jani: Yes Please. Caustics are pretty interesting but so hard to get working. So far I've just about managed reasonable SSS skin and Transmapped hair on characters but my set props - stone, wood, glass, water, metal etc are all pretty poor so far so I'd love to see how you did it.