Despite weather complications, the film was largely shot in chronological order. During production, it was reported that Liv Tyler came down with tonsillitis due to the extensive screaming the role required her to do. Tyler would later recall it being the most difficult film she had ever worked on, "both physically and emotionally." According to Laura Margolis, who played the Pin-Up Girl, Tyler also specifically requested that she not see her mask prior to filming: "I got strict instructions not to let Liv see me in my mask before we shot," Margolis recalled. "The first scene that I shot was stalking [her] outside of the barn. I had been told that she really wanted to be scared. She didn't want to have to fake it, and so it was my responsibility to really scare her. So we shot that scene, I ran at her, she started actually screaming, and then she kicked me away." The masks featured in the film were chosen by Bertino, who wanted them to appear as though the killers "could have picked them up at any store." Post-production Film editor Kevin Greutert was hired to edit the film; at the time, he had recently finished editing Saw III. Several changes were made to the film during post-production, primarily regarding the conclusion: In the screenplay and the original footage shot, the three masked strangers reveal their faces on camera. After the sequence in which Kristen and James are stabbed, the strangers wander around the house, cleaning up parts of the crime scene before dressing into Kristen and James's clothes. Following test screenings, it was decided by the producers that the strangers' faces should remain unseen to the audience, which required the sequences following the stabbing to be excised. Music A musical score, consisting of 19 pieces composed by score producer tomandandy, was released on May 27, 2008, and was distributed by Lakeshore Records. The album was received with generally positive reviews by critics. "It's a creepy score for what appears to be a movie that will make you jump as well as make sure that the doors are locked at night," writes reviewer Jeff Swindoll. "This is an impressive score and adds a tremendous chill-factor to the film," says Zach Freeman of Blogger News, grading it with an A. Track listing Songs from Film, but not on Soundtrack "Ariel Ramirez" - Richard Buckner "Hopeful" - Jennifer O'Connor