Miller, Frank. Particular attention was paid to photographing Bergman.
My point is that assertions about metaphorical framings can be difficult to substantiate when trying to determine how framings are staged and designed in relation to the viewer. How did it come about? Yet, even in these shots the sense of mood is primarily determined by the inscription of the viewer's presence as a secret observer.
As to how aperture framings in Casablanca influence the mood of the film, I would argue that the white arch-shaped and circular framings inspired by Moorish architecture help establish a mood that can be described as exotic and mysterious. Thus, in order to fully appreciate the film, you must actually listen to the dialogue.
The coffin framings in F.