I know this is not the Bryce Forum but I would like to know the difference. I got a couple of hints at the Bryce Forum but it was not what I really asked. So here it goes. I did a test render of two spheres with exactly the same texture. One was render with antialiasing normal and one with antialiasing draft. I could not see the difference between the two except that draft seem to antialias as it render ( no separate pass for antiallias) and it took almost 4 times longer to render. When I render to disk , at 300 dpi, I get a great resolution and detail. So, when would you use antialiasing draft??