The script was originally written as a stage play.
In a 2022 interview with ComingSoon, Lucky McKee went in-depth on his shooting process for this film: "...honestly, we didn't do a lot of takes per angle - but they were long takes. I mean, most days, we'd set out to shoot a six-minute run, an eight-minute run, a 10-minute run - uninterrupted - of these guys just dueling dialogue. But what that gives you performance-wise, when you're able to sit in something for that long is even if the beginning of the take starts out a little rough and they're not quite engaged yet, by the time they get deeper and deeper into it, the feelings and the pace and, and everything really starts to feel more organic and more like these guys are really living in the moment, you know?
Even when we got into the edit, our edit cues weren't based on some storyboards or some rigid plan I'd had before. They were really based on this rhythm that the actors had established. There are certain cases where we had to modulate that for pace or anything like that, just to keep the story moving along. But you'll see in the film, there are some long moments where it's just these guys, because they were just so ... they were just so plugged in emotionally. When you do three 10-minute takes going one way on one guy and then you turn around and you do four takes going the other way on the other guy, that's a lot of time! If they're 10 minutes a piece, that's 70 minutes! And that's not taking into account the time between setups. So two or three hours later, you're still running through that same thing. But it was always in the spirit of chasing a feeling of truth and a feeling of genuine human behavior. Also just trying things, sometimes ... I joke all the time that whenever I do six or seven takes of something, it usually means I got it on the second take.
But that's, that's the process. When you're shooting a film, you're excavating a piece of marble that you're going to carve up and turn into a statue later on. You want the biggest piece of marble that you can have, so you have room to try things. This one was just like an utter pleasure from beginning to end working on it. We had such a good time."