Painting the sky Source/credit: NootellaDude What am I looking at? The building is being painted in a color that matches the sky, making it very hard to distinguish between the building and the sky. The top of the brick wall is still unpainted, and the left side lines up with the street light. More optical illusions:Snake catBeach at NightDog Head MountBent over the deskFind the black carGiant bullfrogShadow catFloating Black Cat