http://users.skynet.be/J.Beever/pave.htm
Anamorphic illusions drawn in a special distortion in order to create an impression of 3 dimensions when seen from one particular viewpoint.
Julian Beever is a very special painter. He has mastered the technique of anamorphic painting, which he applies to pavement paintings to render awesome, stunning images that pop out of the floor. Anamorphic painting has been used since the Renaissance; great examples are the ceiling and cuppola of St. Ignatius, by Andrea Pozzo, in Rome, or “The ambassadors“, by Holbein. However, what I like of Julian Beever is not only that he literally brings the technique to the streets, but also the sense of humour that he shows when he poses with his paintings.
More on Anamorphosis: http://myweb.tiscali.co.uk/artofanamorphosis/
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