announced that Jodie Foster would star in the film with Douglas. However, Fincher was uncomfortable with putting an actor and movie star of her stature in a supporting part. After talking to her, he considered rewriting the character of Conrad as Nicholas' daughter so that Foster could play that role. However, Douglas did not like the idea and requested that the character be changed to his sister, which Foster found peculiar as Douglas is almost 20 years her senior and appeared with her in Napoleon and Samantha when Foster was only 9 years old while Douglas was 28. Due to differences in opinions and scheduling conflicts with Robert Zemeckis' Contact, Foster could not appear in the film. Once she left, the role of Conrad was offered to Jeff Bridges, but he declined, and Sean Penn was eventually cast. Later, Foster alleged that she and PolyGram had orally agreed that she would appear in the film, and when this did not transpire, she filed a $54.5 million lawsuit against the company. Deborah Kara Unger's audition for the role of Christine was a test reel consisting of a two-minute sex scene from David Cronenberg's Crash. Douglas initially thought it was a joke, but when he and Fincher met her in person, they were impressed by her acting. Filming Principal photography began on location in San Francisco despite studio pressure to shoot in Los Angeles, which was cheaper. Fincher also considered shooting the film in Chicago and Seattle, but the former had no mansions nearby, and the latter did not have an adequate financial district. The script had been written with San Francisco in mind, and he liked the financial district's "old money, Wall Street vibe." However, that area of the city was very busy and hard to move around in. The production shot on weekends to have more control. Fincher utilized old stone buildings, small streets, and the city's hills to represent the class system pictorially. To convey the old money world, he set many scenes in restaurants with hardwood paneling and red leather. Some of the locations used in the film included Golden Gate Park, the Presidio of San Francisco, and the historic Filoli Mansion, which is south of San Francisco in Woodside, California and stood in for the Van Orton mansion. For the visual look of Nicholas' wealthy lifestyle, Fincher and the film's cinematographer Harris Savides wanted to create a