The second is how I react to this decaying structure and the encroaching vegetation. It is simply a black and white conversion of the same photo. I minimized the luminance of blue and tweaked the influence of other colors, much as if I had shot through a very dense red filter. This is why the sky appears black. There are similarities to the look of infrared capture, but IR film or IR digital capture would have rendered some things differently. I adjusted the color response to yield the structural emphasis that I wanted.