Have you ever looked at an ordinary object and suddenly seen it in a truly unique way?
Had quite a few of those.
One day I was sitting watching TV, and suddenly all I could see was thousands of small coloured dots changing colour rapidly. Could not see the picture, just lots of little dots. Took a couple of minutes before I got to see the picture again.
Brings to mind a poster in saw in a poster shop in the late sixties or early 70s
“Yea though I walk through the valley of the shadow of death,
I shall fear no evil;
for I am the meanest son of a bitch in the valley“.
If I get close enough to the TV I can make it happen at will. In a sense it is just the old saying “can’t see the wood for the trees”.
I’m not surprised that we are a group of Escher enthusiasts here.
When it comes to illusions, I like this one.
Which way is she spinning,
Now look again, and see if you can make her spin the other way.
How quickly can you make her change direction?