nerd announced they updated PP2016 to use GPU acceleration.

here's PP2014 test room with idl 0.8, 32 bounces, hsv 64 on envsphere. it seems to run up against some limit of bounces, as 32 appears same as 16.

may be necessary to increase IDL to 1.0, which I avoid due to diffuse multiplication between nearby surfaces. will try later.

it may be necessary in PP2014 to render as hdri optimised to get it to look better.