Back in the 80’s Douglas Trumbull was going to shoot the featutre film Brainstorm in Showscan, a 70mm 60fps process he developed, but it ended up only being used for ride films. What I saw of Showscan at the Luxor in Las Vegas back in the 90’s was much more impressive than what Peter Jackson tried with the Hobbit trilogy.
Well, I’m not saying it’s impossible, it just seems unlikely to me.
Also 70mm in 60fps sound like a nightmare to shoot. I didn’t even know it was possible to shoot an entire feature like that. How long were these “ride films”?