New York, April 21 (IANS): “The Dark Knight” director Christopher Nolan has described his filmmaking process as “some combination of intuition and geometry”.

He opened up about it in one of the Tribeca Talks series of public conversations at the 2015 Tribeca Film Festival.

“I don’t write a story outline,” Nolan told a packed house of festival-goers during the discussion with fellow director Bennett Miller, reports variety.com.

“Usually my answer right off the bat is that I work intuitively, but I draw a lot of diagrams when I work. I do a lot of thinking about etchings by Escher, for instance.

“That frees me, finding a mathematical model or a scientific model. I’ll draw pictures and diagrams that illustrate the movement or the rhythm than I’m after,” he said.

Nolan added that he always begins a film in an effort to find answers to interesting questions.

“It’s only as I get into it that I realize they were questions hanging over from the last film,” he said.

Nolan has directed highly acclaimed films like “Inception”, “The Dark Knight” trilogy and “Interstellar”.