hmmm! I really don't know what to answer here, because it works fine for me. It renders first , then anti-aliases and then renders glow (you can see the advancement at bottom of the screen). Maybe you could try to give more glow. The other possibility it doesn't work may be that you have not anough memory and the render stops before its end? Have you tried to render to screen in 1024 size? Does it work? Is it only a problem when you render to disk?