I found a new tool - https://www.immersity.ai
It turns 2D images into 3D motion or stereo images. I’ll have to upload some of the videos to YouTube, but here are the stereo pics. I think they look better when looked at in parallel (relaxing eyes by looking past the pic) versus crosseye, but it’s still pretty cool.
I tried a variety of different renders. I have a 1950s Kodak stereo camera so I’ve done a bit of experimenting over the years with stereo photography. (I even tried some in-game back on Live, which was way harder than it seems because characters and backgrounds aren’t static enough, but it worked.)
Anyway, for best results, use pics where the elements of the image are clearly separated into foreground, middle, and background.
To do parallel, it helps to kind of look through the screen and slightly downward.