Stellan Skarsgård's body makeup took 8 hours to apply and 2 hours to remove for every day of shooting. He didn't drink anything and took Imodium pills in order to avoid having to go to the bathroom during shooting days.
Greig Fraser, cinematographer of both Dune: Part One (2021) and this film, suggested to shoot the sequence on Giedi Prime (the Harkonnen homeworld) with infrared cameras to give the skin a translucent texture.
Lady Jessica's facial tattoos are the Bene Gesserit litany against fear.
Denis Villeneuve said he will not release any deleted scenes, explaining, "I'm a strong believer that when it's not in the movie, it's dead. I kill darlings, and it's painful for me. Sometimes I remove shots and I say, 'I cannot believe I'm cutting this out.' I feel like a samurai opening my gut. It's painful, so I cannot go back after that and create a Frankenstein and try to reanimate things that I killed. It's too painful. When it's dead, it's dead, and it's dead for a reason. But yes, it is a painful project, but it is my job. The movie prevails. I'm very, I think, severe in the editing room. I'm not thinking about my ego, I'm thinking about the movie."
The language used often times by the Fremen is named Chakobsa in the novels, which derives from the real-life Arabic, although also contains parts of French, Greek, Romani and Slavic, including heavy alterations from Hebrew and Sanskrit.