optical illusion

Christmas decorations with lines

The Christmas decorations are drawn to look three-dimensional using cross-contour lines. Through the combination of colored parallel lines and cross-contour lines we create an optical … Read more

Op Art Snakes

  Can lines create three-dimensional optical effects? Here is a new example with three snakes trying to camouflage themselves between the lines … With students … Read more

Optical illusion cube

Is it a small cube in a room or a large cube that lacks one corner? Is easier to draw this cube, rather  than to describe … Read more