Just a simple test of the Yellow Glass theory, System is 800Mhz Duron W/512 Ram, Win98SE and geforce 3 AGP card: Rendered in preview window at 864x568 Doc size. All AA modes used Render was faster on Super AA with Yellow over clear glass NO AA clear glass no aa = 3 seconds clear glass no aa = 4 seconds Yellow glass no aa = 5 seconds NORMAL AA No glass normal aa = 6 seconds clear glass normal aa = 6 seconds Yellow glass normal aa = 7 seconds Super AA No glass SuperAA 16 rays per pix = 1.02 Mins clear glass SuperAA 16 rays per pix = 1.48 Mins Yellow glass SuperAA rays 16 per pix = 1.14 Mins Prem AA No glass Prem 16 rays per px all options (DOF set to Triangle) = 2.19 Mins clear glass Prem 16 rays per px all options (DOF set to Triangle) = 3.25 Mins Yellow glass Prem 16 rays per px all options (DOF set to Triangle) = 5.05 Mins