The fall of light, from light to dark and top to bottom.
The dramatically low light falls at about a 30 degree angle. This is the next stage in creating classic realism. First, it looks like flat, then like a cardboard cut out the has gradual shading from top to bottom. I wrapped up around midnight. On second viewing it with a fresh perspective. I can do much better. I intend on revisiting this stage to blend the tones together more gradually.