It’s just not as easy to manipulate your set in space. The Apogee of Fear recalls props constantly falling out of place, and due to the limited space of the station itself, framing a shot was an obstacle. Tom Cruise is already learning how to use the bathroom in zero gravity for the film, but there’s sure to be a huge learning curve all around, especially behind the scenes just to capture the Mission: Impossible actor.
Article source: https://www.cinemablend.com/news/2547204/3-reasons-its-going-to-be-super-difficult-when-tom-cruise-films-a-movie-in-space