While the Fleischer Superman would obviously be based on the character drawn by Joe Shuster as seen in “Action Comics” and “Superman” comic books, they employed a technique known as “Rotoscoping” in which real-life figures were traced in ink, frame by frame, making the animated figures more believable.
Whether he was used in this fashion or not is unknown, but professional wrestler Karol Krauser was used as the male model by the Fleischers to aid in their portrayal of Superman for the animated shorts.
