One of your basic contentions, I say to the British artist David Hockney, is that there is always more to be seen, everywhere, all the time. "Yes," he replies emphatically. "There's a lot more to be seen." We are sitting in his spacious house in the quiet Yorkshire seaside town of Bridlington. In front of us is a novel medium, a fresh variety of moving image—a completely new way of looking at the world—that Hockney has been working on for the last couple of years.

We are watching 18 screens showing high-definition images captured by nine cameras. Each camera was set at a different angle, and many were set at different exposures. In some cases, the images were filmed a few seconds apart, so the viewer is looking, simultaneously, at two different points in time. The result is a moving collage, a sight that has never quite been seen before. But what the cameras are pointing at is so ordinary that most of us would drive past it with scarcely a glance.