I just publiched on my website some more details on my Realization entry for the Metaverse contest, and a little making-of with some more info.
Have a look if you're interested!
http://www.davidedigiannantonio.com/realization.html
I'd like to share some more technical details here and gather some feedback, so let's start with the final render settings I used on ORC:
Kernel Type: Path Tracing
Samples: 5000
Rayepsilon: 0.0002
Max diffuse depth: 10
Max specular depth: 10
Caustic Blur: 0.0100
Path term. power: 0.6000
Coherent ratio: 0.5
The most interesting one for me was the coherent ratio: I gained a performance boost around 15-30% with 0.5 (instead of 0), but could not use 1.0 because even at 5000 samples some artifacts were still visibile.
Let me know what you think!
