There was somebody a while ago (sorry, don't remember the name) who did an interesting picture spray-rendering another scene over a previous render. As for render settings, I use normal no AntiAlias for all the test renderings. When I'm satisfied, I do a test-render with AA (halfsize, just to have the "feel" of the pic) and then decide if it's the case to use Superfine or Premium. I just love to use a slight slight DOF (radius 0,01 or 0,02), so I often go for Premium. But the times are strong. I can do it now that I upgraded my PC. Before, it was really a pain. Stefano