An alley running back to a junction, where the only sunlight all day gets in sideways.
Notes
Light only gets in at the corner
An alley between two buildings is a slot. The walls go up, the sky narrows to a strip, and the ground spends nearly the whole day in shade. Then it hits a junction, the cross-alley opens the sky wider for about eight feet, and sun lands on the pavement – briefly, and only there. That wedge on the floor is the entire subject.
There’s no sky in the frame. Nothing above the wall tops, no horizon, no source. Every bit of light in the picture is arriving from somewhere you can’t see, which is what standing in an alley actually feels like – you infer where the sun is from what it’s touching rather than by looking at it.
Two doors, and they’re doing opposite jobs. The red one at the back sits right where the light is, so it reads as a color. The one in front right is deep enough into the shade that it’s barely a door at all – just a darker rectangle in a dark wall. Same object, same paint probably, and the only difference is how far each one is from the corner.
No sky, no texture, no line work, and no perspective tricks – the depth is built entirely out of value order. Each plane gets one flat color and the sequence has to be right or the alley flattens into stacked rectangles. The pale wedge on the ground took the most passes. Too wide and it stops being a slot; too narrow and the picture goes dead.
