This is the title of a 17th Century French book whose illustrations instruct the artist about the basics of perspective. The very first steps to a good optical illusion.
anamorphosis
Amazing 3D glass drawing illusion
Don’t push it over!
Anamorphosis in action
How to slow cars with an optical illusion?
An anamorphosis is used to show something that is only recognizable from a certain location and in a certain angle. Most of them are classically hidden inside paintings. But a city decided to use one anamorphosis to make car drivers believe that there is a child playing on the road, forcing them to slow down… where children may play and be at risk from speeding cars.
It would have been even better in open air. But this one is already quite nice.
Source: Geekosystem.
Architectural Illusion from an Optical Projection
Very impressive demonstration of what can be done with a beautiful video projection when it uses as best as possible technical means to make appear what is often ready to become a full blown optical illusion… in architecture.
YouTube link
The designer: www.projectieopgebouwen.nl.
Illusion of fire
Anamorphosis
Anamorphosis is a technique to hide images in another image. It has long been used by painters. And some of them are quite well known like the The Ambassadors (Hans Holbein the Younger, 1533) below.
In this painting, there is a highly deformed skull appearing like a whitish blade at the bottom of the painting.
Learn everything about anamorphosis from Jessica Palmer in ScienceBlogs.