Lisa Gastoni wanted Massimo Pirri to change the ending of the film. The director pretended to agree, shooting a scene from afar with Vera and Simona reuniting in the cage after killing Federico. But when the film was edited, Pirri put back the ending we see today. Gastoni got angry and had the film confiscated, but eventually lost the case and the film was released.
Actress Karin Trentephol was only 12 during filming. She has a nude scene but in the sex scene she is replaced by an older body-double.