Detail: Sky

Edward Hopper, Blackwell's Island 1928

Frederic Remington, Cowpuncher's Lullaby 1906

William Merritt Chase, View Near Polling 1975

Agnes Pelton Sand Storm 1932

Of course I love this last one. The whole painting is so surreal---it's like using your camera in a dream and waking to find the exposure survived the waking!