I don't have an answer to your question, but I remember watching some commentary by a person involved in the making of the film. This is about the final pivotal scene where Captain Renault must quickly decide whether to implicate Rick as the killer of Strasser.
The first version of the scene had the police arrive just as Renault shouts to "round up the usual suspects." Whoever was in charge of the film (I assume the director) said this was all wrong, and told the editor to instead add a dramatic sequence of short cuts back and forth between Rick and Louis, showing that Rick was desperately wondering what Louis would do -- praying he wouldn't turn him in -- and Louis was thinking basically the same thing, realizing he had the option to switch sides in the moment.
As with the Marseillaise scene, this is minutes and minutes of incredible storytelling condensed into just a few frames of dialogue-free film. And apparently (finally getting to your point), it wasn't originally filmed that way; they probably had a bunch of shots of each actor glaring in various directions, and they used them in the editing room to powerful effect.
If anyone has a link to the interview I'm describing, I'd appreciate watching it again.
The first version of the scene had the police arrive just as Renault shouts to "round up the usual suspects." Whoever was in charge of the film (I assume the director) said this was all wrong, and told the editor to instead add a dramatic sequence of short cuts back and forth between Rick and Louis, showing that Rick was desperately wondering what Louis would do -- praying he wouldn't turn him in -- and Louis was thinking basically the same thing, realizing he had the option to switch sides in the moment.
As with the Marseillaise scene, this is minutes and minutes of incredible storytelling condensed into just a few frames of dialogue-free film. And apparently (finally getting to your point), it wasn't originally filmed that way; they probably had a bunch of shots of each actor glaring in various directions, and they used them in the editing room to powerful effect.
If anyone has a link to the interview I'm describing, I'd appreciate watching it again.