That type of art is very popular over in town squares in Europe...these are some of the best that I've seen, I'd like to see them in person!
Usually, like in these pics, the artist dresses up like the peeps in the painting, adding further to the 3D effect from a distance as you walk up to them. Even the beers and the coke are actually real, but the fit into the picture so weel and add to the illusion.