Attached Link: http://www.brycetech.com/tutor/bryce/mask.html

Alpha Channel eh? Well, this is a new one for me, I really dont think you can output a alpha channel through an image. Now I know you can INPUT a channel in pictures, and textures, but rendering just makes the alpha channel enhance the picture object or texture. If you want to do post-production, Masking an image will help. I've included a link. If this isn't what you're talking about I'm sorry... You may want to hunt down Calyxa :] I've seen here around here Ken? Rim? You guys have any ideas? Regards, Matt