Oops, sorry that was the page from the P7 manual but there's not much difference in them so it's there or there abouts [LOL], Oh! Poser manual [in the box]

As for ray tracing I have mine set at 3 bounces which I find sufficient for most things, the max I've used is 5 and that didn't make much difference as I recall!

As for bucket size, Yes I have the "adaptive bucket size" ticked but again use the default settings for the rest [lazy!] and I always start with 32, no more!

Injustice will be avenged.
Cofiwch Dryweryn.