How Snapchat Filters Work
If you're one of the hundreds of millions of people who uses Snapchat every day, you've probably played with its lenses that transform your face into all sorts of humorous, interesting, and horrifying things (trust me, I face-swapped with a clock once, and I looked like a Dali disaster). Making all that magic happen takes a lot of math and computing power, however, and the process is fascinating.