Facts about SAW: Why the pig mask?
Why pig mask, not some other animals? It revolved around the idea of Jigsaw wearing a rotting pig’s head by the original writer Leigh Whannell and director James Wan. So the pig mask was chosen to symbolize the pessimistic view Jigsaw had regarding the world, and the disease that he was “rotting” or dying from.
Additionally, it was also used as a tribute to the Year of the Pig, the year which Jigsaw began his work. It was also seen that he donned a pig mask during the Chinese New Year festival in SAW IV.