A lot of fans of the Friday The 13th franchise want to know where the idea of the mask came from. So, according to the special effects guy in charge Douglas J White it's quite simple. The mask was supposed to be a generic clear mask that Shelly wore in the beginning of Friday The 13th Part III to scare Andy, however after the director wanted Jason to have a mask with more personality they searched for a better one. As all fans know Jason did not have a mask in Part I (he was in it) and wore a sack over his head in Part II and never got his infamous hockey mask until 2/3 into Part III. So, in Douglas J White's own words here's how it came to be. This is from Crash Army.com
