Hex-Ray Vision uses the awesome picture-taking capabilities of the iPhone 5s to create an isometric representation of the world. There’s a ton of math and image processing involved, but here’s the basic principle: The iPhone 5s has two flashes for its camera. By taking a picture with one flash and then the other, the same scene is lit from two slightly different angles. Comparing the two pictures allows Hex-Ray Vision to estimate the surface normal at each point in the image. Finally, a little cleanup and image processing lets us turn the world into Trixels!