Each cel involved in a frame of a sequence is laid on top Sex animation story each other, with Sex animation story background at the bottom of the stack. The graphic style of this film was strongly influenced by the process. The resulting drawings are again pencil-tested and sweatboxed until they meet approval. It is not known if the process was ever used in animation. In the later years of the animation rostrum camera, stepper motors controlled by computers were attached to the various axes of movement of the camera, thus saving many hours of hand cranking by human operators.