Cool. Trippy o_o


I've always wanted a shirt that can cause an optical illusion.

I always wondered why that happens when people wear striped shirts

that's very cool

Hmmm well you see
the actually illusion here is probably caused by the resampling of the image on the computer...
this can be noted when you ctrl++ (a.k.a. zoom in on the resized image) you can tell the stripes are still gone no matter how far you zoom in. As far as in real life this does happen as people walk away from striped objects

what interests me most is when you look at on object with caution lines (striped yellow and black lines often angled) and as your eyes trace it going away from you with perspective you see the lines have actually flipped direction compelty. I first noticed this in the video game Garry's Mod, (initially thinking it was a computer rendering error) and realized it was actually my eyes making the pattern flip.

Motorway gantries in the UK do it as well. Each side of the gantry is 'walled' with a metal mesh that you can see through. As yo drive towards it weird patterns appear in the light shining through.