I understand what you're saying, but I guess I'm seeing something differently than you are?
In the photos, the light seems to be coming from the window (see light from the window on the floor, and hitting the top left of the top hat, his right arm, and his foot), casting shadows down and to the right (see shadows on the side of his cane, on his legs below the knees, and the shadow of his collar on his shoulders).
But since this effect is created by lighting, and that window isn't really the source of light, I'm sure may be off a bit?
Also, as a ghost, maybe he's meant to be glowing (which could better explain the lighting on the walls above him and between him and the window? IDK...
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