We have had dirty windows for as long as we have had windows, made dirty by the polluted air billowing around all historical human activity. However, the toxic particularities of this contemporary life have produced a new kind of pollution, a new and strange dirty air that not only encases our windows with a slimy sludge, making it impossible for our vision to pass through. But this weird encrustation made of the stuff of this new pollution has actually transmogrified these windows into a dynamic, viscous and flexible material medium. This is the process of a window becoming an Overton Window.