Painter reveals optical illusion for downtown Ashland building
At the top of the four-story building, Pugh plans to paint the illusion ... A 1999 Pugh mural alongside a public park in ...
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There's an optical illusion hidden in San Francisco's Transamerica Pyramid
It pops up in a Sirron Norris mural on 20th Street, a mural on the Bernal Heights library, a neon sign in a FiDi bar window and even ... told SFGATE that an optical illusion called the Zöllner ...