It’s the ballroom of the Marriott Solana in Southlake, Texas. The floor is flat, but -because of the patterns on this carpet- you may wonder…

It’s the ballroom of the Marriott Solana in Southlake, Texas. The floor is flat, but -because of the patterns on this carpet- you may wonder…

Dave Munger explains how a classical pointillist painting from Seurat (Sunday Afternoon at La Grande Jatte) may seem to have colours changing when you move in front of it.

It may come from an optical illusion generated by the painter using myriads of little points of different colours.

All about it at Dave’s scientific blog.
Windows correctly framed only from a single location.


You can see this in a movie theater of The Bronx, in New York City.

Just move to the right location to see the illusion:

Source: Neatorama.
Are these really circles or a mere illusion?


Optical illusion made out of only perspective notions and a huge paint job.


3D optical illusion by messing with perspective.


Painting the walls of a room may be enough.


