Around 1/3 of movie, Erica and Aaron walk in the town center. You can see behind them and on their side, a lot of green deciduous trees and bushes. Those behind weren't even sprayed with faux snow. Around ½ movie, plot takes place at Christmas market. Again you can see a lot of green trees and bushes, and again those behind market weren't even sprayed with the faux snow. It's impossible as movie takes place a week before Christmas (mid December) and in Montana.
Very obvious foam "snow" when the main characters first meet in the wood.