I remember back in the day when these sorts of things used to appear all over the Interwebs. The problem, at that time, was the low-resolution screens and crappy moniters gave you the digital equivalent of a dirty hangover when you finished the starefest. Now, thanks to high-def screens, and hlf-decent graphics cards, we can finally experience these optical illusions without needing a post-stare-brain-scan.
The guys over at Unreality have compiled some great examples of these head-spinners:
I’m sure there are some even better ones, if you know of any, let us know!
(source – Unreality)