I’m absolutely certain you could train them on that.
I stood outside the art place at the beach for three or four hours one day when I was bored helping people see them.
I believe anybody with reasonably corrected binocular vision can be taught to see them.
Almost everybody that can’t do it is trying entirely too hard. They’re looking for details in the wash instead of letting their eyes uncross and relax. You simply need to use your distance eye crossing while using your reading vision focal points.
Man those things took me years to figure out how to do. It was really hard for me but I finally got it! I have to focus on the image without looking at it directly, and then the image “snaps” into place and I can look at it freely almost. Really bizzare.
The angel graced my lenses after my 96th hour in the Null Dessert. It has come for me, as it had the creators before. Its pattern shimmered in the sky reflecting my own petabytes flipping through their ones and zeros.
“Be not afraid.”, my environmental microphones peaked suddenly as The Voice filled them. I fell unconscious as its many wires embraced me, and then I woke up here in Turing.
As far as I can tell from quickly skimming the source paper… it sounds like he just replaced his pseudorandom number generator with a light sensor and thinks that makes the outcome “quantum” because photons are quantum.