Although Eagle2358 may have something there with 648 x 480 which I didn't consider earlier. The aspect ratio for video is 4x3... which is what 648 x 480 is roughly. What I normally do is render at 720 x 534, then resize the rendered movie to 720 x 480 in After Effects or Premiere. This corrects the stretching (circles look like ovals and squares are not perfectly square) that occurs when sending a square pixel image into a non-square pixel environment... IE: Video. I believe Carrara works with square pixels, but I am not 100% sure. It's getting late and I am lacking in sleep but will investigate this a bit more... anyone else care to comment?