award for slowest mapper goes to me :blush:
I take that back, I compiled hoodoo last night and ran 20 bounces and rad only took an hour each time, I recon I could get away with 40 or so...10 is default I'm not sure what the max is but I recon 15 is highest you want to go without a supercomputer at your disposal.
Looks like your breaking optimization's golden rule, too, is your map in a giant box?