Last we heard about Darren Aronofsky’s untitled relationship thriller, Domhnall Gleeson and Michelle Pfeiffer had joined the cast led by Jennifer Lawrence and Javier Bardem. That entire sentence is everything we know about the mysterious project, but during a recent Master Class at the Reykjavik Film Festival, Aronofsky opened up about his career and his approach — and shared a couple of interesting details about his upcoming film in the process.

Aronofsky appeared at the fest to accept the Creative Excellence award and lead a Master Class moderated by writer and poet Andri Snær Magnason and director Þóranna Sigurðardóttir (who was also the unit production manager on Aronofsky’s Noah). IndieWire has all the details from the talk, which includes Aronofsky speaking about his creative process and his experiences with studios and actors — including Javier Bardem, who stars in the director’s new, untitled thriller.

Although he didn’t offer any plot details, Aronofsky did reveal two key pieces of information: First, the new project was shot on 16mm (just like his debut film, Pi), but he worked with digital cameras on the last day of filming to support some visual effects that will be featured in the finished product. Second, the new project will be Aronofsky’s first film without a score by Clint Mansell, who has collaborated with the director on every feature since the beginning of his career.

Instead, the project will feature music composed by Johann Johannsson, who previously scored The Theory of Everything and Sicario. That’s definitely an interesting and somewhat surprising development.

Aronofsky also had this to offer about his filmmaking approach:

I think all my early films were more about ideas. When it came to ‘Noah,’ there was this clear environmental statement in the original gospel, which was interesting to push forward. My latest project probably has similar political intentions behind it, but first and foremost responsibility as a narrative filmmaker is making something that is emotional and can connect with an audience.

As of now, the director’s latest film remains mysteriously untitled and has yet to be given a release date. Aronofsky recently wrapped filming on the project, however, and a 2017 release seems quite likely.