Show HN: A raycaster that renders to random dot stereogram (like Magic Eye)

This is a real-time 3D engine (ray caster) that renders to single-image random-dot stereogram (the images made popular in the Magic Eye books). We can repeat this exercise for every point on the surface of the geometry we are rendering, and the result will be a list of constraints on the output image (pairs of pixels that must be equal). By similar triangles, we get

where EYE_SEPERATION is the distance between our eyes (in pixels), and z is the depth of the scene at the point in question, measured in distance from the image plane, in multiples of the distance from our eyes to the image plane.

Source: github.com