Due to the location being in close proximity to the North Pole during the summer, Slash/Back differs from the vast majority of horror films by being set almost entirely during daylight - even during the evening.
In a 2022 interview with Film Threat, Nyla Innuksuk spoke about how she blended practical on-camera techniques with cgi: "There was this amazing contortionist that I got to work with, Troy James, who can do the craziest things with his body. So we got to work with these 'skin-suits'. We had actors that get turned into aliens, these suits made of their skins that the contortionist and also a stunt double... would just wear. They would like put them over their head and they'd have gloves and stuff as well... and then Troy could do the craziest things with his body. He could like bend over backward and he's double-jointed and everything. So that was really fun and then we kind of matched those kinds of movements with cg creatures. Actually we had this big polar bear suit made for Troy that could only work with him wearing it. He's like upside down and backwards walking... wearing the suit was uncomfortable for sure. And running down a hill in that suit for over the course of a day was probably torture. And I thought that it looked really, really cool but it also looked so weird. So we ended up just kind of matching it with cg and really using that as inspiration for the cg version of the bear."
Being hailed as Attack The Block meets The Thing