The Great Crevase Edgar Mueller!
Together with up to five assistants, Mueller painted all day long from sunrise to sunset. The pictures appeared on the East Pier in Dun Laoghaire , Ireland , as part of the town's Festival of World Cultures.
He spent five days, working 12 hours a day, to create the 250 square metre image of the crevasse, which, viewed from the correct angle, appears to be 3D. He then persuaded passers-by to complete the illusion by pretending the gaping hole was real.
Just shows, If you believe u really CAN achieve.......(yes i am taking it back to 3rd grade)