Gerhard Richter goes in a new direction

WiReD magazine's web site has an interesting article on this, titled Pixels, Not Parables, for Cologne Cathedral's Stained Glass Window. They go on to say that:

Contemporary German artist Gerhard Richter designed the 65-foot-tall work to replace the original, destroyed by bombs in World War II. As a starting point, he used his own 1974 painting 4096 Colors. To create that piece — a 64-by-64 grid of squares — Richter devised a mathematical formula to systematically mix permutations of the three primary colors and gray.