Here are 25 of the motivations and mechanisms of sensory deception. Learn how to use this in our class guide. The Hermann grid illusion is fairly popular and can be seen in layouts which contain a grid of squares placed on a high contrast background. Enter the fascinating world of illusion which will trick your confidence in senses, but amaze you by doing it; the world through our senses, a constant torrent of sights, sounds, smells, and more. Browse the illusions below to find out more.