Optical illusions are fun ways of tricking the brain. Some of them cause us to perceive movement when their is none, others cause us to see something as being far larger or smaller than it really is, ...

Try making a 3-D hand drawing. It’s easier than you think and requires no special artistic skills.

3D design tool which can create 3D modeling in the air using not only PC and tablet but also hand controller of VR headset "Gravity Sketch"Has appeared. The created 3D data can be moved with the hand ...