Amazing effect! Another masterpiece from Julian Beever (others here).
The below drawing is just chalk on the pavement.
Julian Beever has made pavement drawings for over ten years. This drawing is just one illusion of a recent batch posted on his site.
Here is a photo of the Julian kneeling on top of a bottle of Slate 20, apparently begging for a drink.
Little <-> Large
(C) 2006 Julian beever