 A potential continuity error was fixed with visual effects. Due to  the short shooting schedule and lack of control of the sound stage,  the soles of the actors bare feet became soiled while shooting on  the hotel room set. Shots captured included views of the actors  dirty feet as they got into and out of a clean bed, which would be  unlikely in a carpeted hotel room. An error that was not caught by  the Script Supervisor on set. During post production, the  Director/Editor discovered that 5 shots included in the final edit  would include dirty soles. In order to address the problem, the  visual effects supervisor rotoscoped the bottom of the actors feet  to delineate the parts of the frame that needed to be replaced.  Since shooting replacement soles against green screen in the precise  size and angles necessary to fill the rotoscoped sections would be  cost prohibitive, the digital compositor searched the Internet for  replacement feet photographs. He discovered that the best and  highest resolution images of feet were on foot fetish websites. Thus  the replacement feet in those five shots are "pornographic feet".