Lots of comments here assume you have to have two images. (And how to we reduce the flickering, etc.) Nope. Nothing to do with stereo here; it is all about sim

Lots of comments here assume you have to have two images. (And how to we reduce the flickering, etc.) Nope. Nothing to do with stereo here; it is all about simulating a moving viewpoint within a 3-D scene. Three cues help the brain figure out 3-D: stereovision, focusing, and the effect of movement on a scene. This is doing the last one above. Now, the simplest thing to do is move rapidly back & forth between 2 viewpoints, but there are other things one could do. For example, move the viewpoint smoothly from one point to another and then back. Or you could move the view point smoothly in a small circle. Etc. Want to reduce flicker? Then do one of those. Of course, they require more than 2 frames. BTW, my favorite example of the "movement helps with 3-D" effect is the map room scene in Star Trek Generations. (Probably on YouTube, but I can't find it.) If you watch it, notice how the scene being viewed continually moves around, even when it doesn't really need to.