Tilda Swinton’s scene in “Avengers: Endgame” only took one day to film. But she said she had to return and redo the scene because there was a change in script. According to Comicbook.com, the changes had to do with time-traveling logic. Swinton said it was only a couple of lines changed and a tweak to her costume as well. She said: “The tweaked it [the film] into something extraordinary.”