Commenting on the change to filming in 3D, Bell stated it would not affect his performance or methods of acting, noting that it would be an "interesting experience". Mandylor called the 3D shoot "more tedious and longer". Flannery described the 3D aspect as being "[not] shot in 3D so that you can, per se, see blood coming directly at you. It's in 3D for the texture and the depth, for the architecture, to get a sense that you're in the scene but there's no 'we want to see blood coming at the lens' it's nothing like that. But I think we made a good movie." Post-production services were provided by Deluxe. Filming of the trap scenes, which was done last, began in March. The film's opening trap scene was filmed at Metro Hall in Toronto, Ontario, just outside Roy Thomson Hall, and included 400 extras. In the trap, the circular saw blades were actually real and functional, but safety precautions were taken for the actors. One actor that was in the trap, Jon Cor, told Demon FM that he had scars on his hands from the shackles, and said the other actors, Sebastian Pigott chipped his tooth and Anne Lee Greene lost the feeling in her feet and had to receive medical attention. Producer Oren Koules told horror news website ShockTilYouDrop.com that there are eleven traps in the film, the most ever in the franchise. There is one "trap" scene in the film that producers would not allow in previous "Saw" films that they described as "too violent", "too disgusting", and "just wrong". Melton later confirmed that was the "Garage Trap", which involved a car and sets off a "chain reaction" with other characters. Gabby West was part of the trap. She told VH1, "They molded my entire face, and basically my entire upper body after my belly button. They put layers and layers of different materials on you and you have two straws in your nose so you can breathe. It was so scary! They put so much of it on, you can't see and they put it in your ears so you can barely hear anything. That was part of the prep for the film, which was really cool, to have a dummy made of yourself. But scary." Over 25 gallons of fake blood was used in the film, which was two and half times more than "Saw II". The film's score was composed by Charlie Clouser and released on iTunes through Evolution Music Partners on November 2, 2010.