You might not realize it, but a lot of the snow you see in your favorite holiday film is actually a bit of movie magic. Special materials (honed over a century of sometimes dangerous experimentation), technological wizardry, and actual snow consultants come together to craft all those wondrous flurries, squalls, and snowbanks. Here’s an inside look at how Netflix holiday movies – from The Knight Before Christmas to Holiday Rush – let it snow, let it snow, let it snow.