Matthieu Robert Ortis is an amazing artist specializing in wire sculptures. He takes an anamorphosis approach to many of his work. Take a look at the video below.
For the viewer, they can only see the work at a particular perspective as it was intended. Being at different vantage points allow the illusion to transform in front of your eyes. Therefore, a bystander walking by will only see random distorted wires if they are not at the vantage points. It is all in the perspective in how objects are perceived. Life is all about perspective.
In addition, another anamorphosis video of the GOAT.