Waverly wrote: > Has anyone done work with Grand Central Dispatch? If so, how did it turn out? I do not *need* it but I have wondered how much faster some of my processes would be if I were to engage that technology. See FB_5_4_7_Examples/Graphics/QuickDraw/Ray Tracing. A short introduction: http://en.wikipedia.org/wiki/Grand_Central_Dispatch Robert P.