Rooftop portrait loses colour
A wide rooftop shot drains to monochrome while the subject keeps moving. a wide shot of a person standing on a flat rooftop in late afternoon in full colour, the saturation draining out of the sky first, then the brickwork, then the clothing, until the whole wide frame is black and white with one soft grey band of cloud, the person walking slowly toward camera through the change without reacting to it, slow push in

