I normally keep my IC at 10 when I use IDL. I hardly ever do finished renders these days, but I like detailed previews. My renders do stick at the trans maps, but overall the render time is about the same. Maybe there's some magic forumula that has to be set between the render settings, the figure and prop settings and number of threads. Who knows. But it's not worth getting huffy about. We've only had it a couple days ;)

Laurie