much as possible. At times, Lyne's directing took its toll on the cast and crew. In a scene taking place in an office, the director pumped it full of smoke, an effect that "makes the colors less contrasty, more muted". According to Biziou, "The texture it gives helps differentiate and separate various density levels of darkness farther back in frame". The smoke was piped in for 18 to 20 hours a day and Gere remembers, "Our throats were being blown out. We had a special doctor who was there almost all the time who was shooting people up with antibiotics for bronchial infections". Lane acquired an oxygen bottle in order to survive the rigorous schedule. The film has many explicit sex scenes, including a tryst in a restaurant bathroom and a passionate exchange in an apartment building hallway. Lyne's repeated takes for these scenes were demanding for the actors, especially for Lane, who had to be emotionally and physically fit for the scenes. To prepare for the initial love scene between Paul and Constance, Lyne had the actors watch clips from Fatal Attraction, Five Easy Pieces, and Last Tango in Paris. Lane and Martinez would also talk over the scenes in his trailer beforehand. Once on the set, they felt uncomfortable until several takes in. She said, "My comfort level with it just had to catch up quickly if I wanted to be the actress to play it." Martinez was not comfortable with nudity. Lane said that Lyne would often shoot a whole magazine of film, "so one take was as long as five takes. By the end, you're physically and emotionally shattered." Lane had not met Martinez before filming, and they did not get to know each other well during the shoot, mirroring the relationship between their characters. A full four weeks of the schedule was dedicated to the scenes in Paul's loft, which was located on the third floor of a six-story building located on Greene Street. Biziou often used two cameras for the film's intimate scenes to reduce the number of takes that had to be shot. Post-production Lyne shot five different endings to Unfaithful based on his experiences with Fatal Attraction, whose initial ending was rejected by the test audience. According to Lyne, he had some debate with the 20th Century Fox officials, who wanted to "make the marriage gray, the sex bad. I fought that.