bluetone - 'fraid I don't have video editing capabilities. I had hoped that Carrara Studio2.1 alone would allow me to make .swfs and gifs for use in Atmosphere (I have Flash Image Builder, which converts animated gifs, avis etc to swf). I guess I'll just have to forget about transparent backgrounds - it sounds way beyond my capabilities LOL. I wonder why that option for setting black as transparent (with gifs) is inactive? That would be pretty useful.