What lighting effect does the author seem most confused by?

Choices:
A. not enough information
B. the various pieces of wood and props in the frame
C. the black circular shadow
D. the shadow on the cowboy
the black circular shadow
The Good, The Bad and The Ugly is a great film, and often regarded as one of the greatest films of all time. I never much paid attention to how the film was lit, but on examination I don’t know what I think of the lighting. Maybe i’m totally wrong, but the lighting seems quite obvious when you pay attention to it, which makes me thing it could have been done better? Certainly the lighting is masterfully done, in the way it properly exposes the characters faces and splashes off and around certain props and objects, adding a great deal of dimension to many of the shots. But it does look quite obvious, once you pay attention to it, especially when you can see multiple shadows coming from a single character. All that said, the lighting is still pretty masterful and I’m very intrigued to properly analyse it.
The first shot of the scene has extremely beautiful (even though it is obvious 😉 ) lighting. As the cowboy stands in the hallway you can tell that there is a strong key light coming from the left of the frame, that will light his face once he steps out of the shadows. It seems like there is another light, maybe coming from high up near the roof, lighting the right hand side of the frame, near the back of the hallway. Most likely facing towards the character to light him from his right hand side, to seperate him from the background. The lighting setup of this shot is extremely beautiful the way it enhances the various pieces of wood and props within the frame, and how they’ve managed to keep the cowboy drenched in shadows as he sneaks around, even though there is quite a lot of light within the frame. It looks like they may have used a cutter to achieve that effect as its a very specific area, essentially just the top half of the cowboy thats drenched ins shadow. Theres also this curious black circular shadow which exists at the very top of the door near the cowboys head which permanently stays extremely dark, much darker than the rest of the shadows in the frame. I wonder how they achieved this effect? Maybe a very specifically located circular cutter.