This is the final render. 10'000'000 photons, 60 blur samples in focal
blur and 5x5 area light with adaptive 1. It took 3h to render this - of
which 2m 43s to shoot photons.
It is funny how the caustics on the checkered floor look almost like
reflections. The floor, however, is not reflective. I think this effect
could've been reduced by using less photons.
Severi
