As I recall, it's 720x536 pixels, but folks use 540. IF you've got a Mac with a SuperDrive running OSX or access to one, it's become simple to make a DVD. Render your animation as a series of still images, import them into iMovie (or the new FinalCutExpress), adding transitions and marking chapters if you want them. (I always tell folks to render to images anyway, because you don't have to start from scratch if there's a problem part way through a long render, and you can use them in other ways later.) Then drag-and-drop the movie into the iDVD, which even has built-in, customizable templates for motion menus with chapters. I believe the movie ends up in MPEG2 format; looks good. (iMovie and iDVD are free.) HTH, Elisa/gryffnn