From a german interview with the Quays:
"In 2015 Christopher Nolan filmed a short documentary about you. How did the world's commercial director want to make a movie about you?
Very exciting. The best thing was that he came to our studio, which is our house, and filmed with a 35 mm camera that he operated himself. And he knows very well what he is doing, when he was a young man doing experimental films. He sees the animation like us and realizes that the miniatures have their own kingdom and it is immense. And one year after doing the short, he offered to produce a movie with the condition that it would not last more than 25 minutes and that we shot it in 35 mm. And, clear, we accepted charmed. We sent a kind of script and confessed that he understood nothing but did not matter because he trusted us. We finished filming a month ago and now we are working on the assembly."
https://www.ara.cat/cultura/Germans-Qua ... mpaign=ara
"In 2015 Christopher Nolan filmed a short documentary about you. How did the world's commercial director want to make a movie about you?
Very exciting. The best thing was that he came to our studio, which is our house, and filmed with a 35 mm camera that he operated himself. And he knows very well what he is doing, when he was a young man doing experimental films. He sees the animation like us and realizes that the miniatures have their own kingdom and it is immense. And one year after doing the short, he offered to produce a movie with the condition that it would not last more than 25 minutes and that we shot it in 35 mm. And, clear, we accepted charmed. We sent a kind of script and confessed that he understood nothing but did not matter because he trusted us. We finished filming a month ago and now we are working on the assembly."
https://www.ara.cat/cultura/Germans-Qua ... mpaign=ara