Robert Vogland is an amazing  artist who draws 3D illusions on pool floors His works are included in over a thousand private collections through out Hawaii, the mainland U.S., Hungary, French Polynesia, Australia, Spain, Egypt and China. It’s done with mosaic technique.Every mural is made entirely by hand with no power tools. It is a timeless process. Every mural is made to order See more of his work at the official website link