In the case of D-Box, the company responsible for maintaining and managing the seats also seems to be responsible for working directly with the film producer to determine which effects go where in each film.
The seating is actually provided under franchise (to the cinema) in the same way that a coca-cola distributor might provide the cinema with a Soda Vending Machine in their lobby. A percentage of the extra cost of each 4DX seat sold goes directly to D-Box and the remainder of the profit goes to the cinema in the usual way.
How do you work with the filmmakers on determining the activity levels and timing of effects? On average, how many movements/effects
are chosen? And does any particularly effective film come to mind?
We work with the post-production team of the studio. We only put
motion where the movie calls for it. Usually a two-hour film will have
about 30 to 40 minutes of motion. We don’t want to distract from the
movie, we want to immerse. So when scenes call for action (fight,
races, etc.) we put the motion from subtle to intense, depending on
Generally, our motion coders provide the information as number of MFX
events, MFX total time and MFX percentage. But it is hard to say which
title that we have completed had the most effects or most diverse mix.
But it is safe to say that classic chase scenes, gunshots, fight
scenes, explosions, natural disasters such as earthquakes, tornados,
storms, etc. all lend themselves for fantastic possible MFXs.
Since only blockbuster films merit a 4DX production, I'd imagine that it's the marketing people at Marvel, Sony, Disney, etc. who liaise with the 4DX provider rather than anyone who was involved in the day-to-day making of the film (e.g. the Director / Screenwriter, etc).