As a not quite middle aged dude, I only just now figured out how to see magic eye stuff. I tried a couple times in elementary school but didn’t get it so I stopped. Had a few drinks earlier, stumbled on some magic eye pic that I could see clear as day and it blew my mind a little
But then you see them inverted.
3d cross eyed pictures and magic eye work in similar but different ways
Yup you want to focus farther than the picture. Crossing your eyes mature you focus closer.