(Rhythm Rathi/CBC) Ji Hyang Ryu said it took her about two weeks — and two litres of black paint — to turn the white walls into an artistic illusion. She said it was her first time working on ...

Only 9% of people can correctly identify the colours in a black-and-white illusion with diagonal coloured lines. This visual trick, highlighted at London’s Twist Museum, demonstrates how our ...

Looks, though, can be deceiving: the depth in the two-dimensional wall drawings gives an illusion of 3D. The furniture in the café has been painted in such a way to appear to be two-dimensional.