In this photo taken Thursday, Oct. 24, 2013, a man walks between a pair of 12-foot high views of Yosemite National Park, made by David Hockney using an iPad, at an exhibit in San Francisco. A

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In this photo taken Thursday, Oct. 24, 2013, a man walks between a pair of 12-foot high views of Yosemite National Park, made by David Hockney using an iPad, at an exhibit in San Francisco. A sweeping new exhibit of Hockney’s work, including about 150 iPad images, has opened in the deYoung Museum in Golden Gate Park, just a short trip for Silicon Valley techies who created both the hardware and software for this magnificent reinvention of fingerpainting. (AP Photo/Eric Risberg) less 

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Associated Press
Mon, Oct 28, 2013 8:08 AM EDT