From “David Hockney’s iPhone Passion,” a 2009 New York Review of Books article about an older artist becoming obsessed with new technology, by the brilliant non-fiction writer Lawrence Weschler:

“Hockney first became interested in iPhones about a year ago (he grabbed the one I happened to be using right out of my hands). He acquired one of his own and began using it as a high-powered reference tool, searching out paintings on the Web and cropping appropriate details as part of the occasional polemics or appreciations with which he is wont to shower his friends.

But soon he discovered one of those newfangled iPhone applications, entitled Brushes, which allows the user digitally to smear, or draw, or fingerpaint (it’s not yet entirely clear what the proper verb should be for this novel activity), to create highly sophisticated full-color images directly on the device’s screen, and then to archive or send them out by e-mail. Essentially, the Brushes application gives the user a full color-wheel spectrum, from which he can choose a specific color. He can then modify that color’s hue along a range of darker to lighter, and go on to fill in the entire backdrop of the screen in that color, or else fashion subsequent brushstrokes, variously narrower or thicker, and more or less transparent, according to need, by dragging his finger across the screen, progressively layering the emerging image with as many such daubings as he desires.

Over the past six months, Hockney has fashioned literally hundreds, probably over a thousand, such images, often sending out four or five a day to a group of about a dozen friends, and not really caring what happens to them after that. (He assumes the friends pass them along through the digital ether.) These are, mind you, not second-generation digital copies of images that exist in some other medium: their digital expression constitutes the sole (albeit multiple) original of the image.”