BERLIN — Well over a decade after filming started, and a year after its chaotic rollout as an immersive installation in Paris, “DAU” has finally made it here to Berlin, the city where it was supposed to first be seen.

The Russian director Ilya Khrzhanovsky’s unwieldy biopic of the Soviet scientist Lev Landau has found its way into the 70th Berlin Film Festival, not as a single project but as two feature films screening through Sunday. “Natasha” and “Degeneratsia” (“Degeneration”) have a combined running time of eight and a half hours. But that represents only a sliver of the 700 hours of footage shot for the project.

“DAU” grew out of a multiyear experiment in which hundreds of nonprofessional actors lived and worked in a replica of a Soviet research institute, what may be the most ambitiously immersive film set ever made, in Ukraine. People played versions of themselves, transposed to lifestyles and careers of the Soviet Union. Artists, scientists and religious leaders visited the set, becoming part of the production and even holding lectures and workshops.