 According to a "Behind the Scenes" featurette on the film's DVD, a close look at the creature shows it to have a small goatee beard, suggesting its connection to Dr. Morbius, the only character with this physical feature.Unusually, the scene in which the Id Monster is finally revealed during its attack on the Earth ship was not created using traditional cel animation.Instead, Meador simply sketched each frame of the entire sequence in black pencil on animation stand translucent vellum paper; each page was then photographed in high contrast, so that only the major details remained visible.