Mike Figgis has been shooting a behind-the-scenes documentary for the past 18 months about the making of Francis Ford Coppola’s Megalopolis. It’s called Megadoc.

Figgis told me Monday that it’s been edited but there’s allowance for the fact that the film played in competition here at the Cannes Film Festival. He recorded an interview with the cinema titan the other day.

Figgis, who was introduced into the Coppola clan back in the mid 1990s after directing Nicolas Cage in Leaving Las Vegas, told me that the documentary is “very much a fly-on-the-wall” and also features conversations with various cast members — Adam Driver, Aubrey Plaza, Dustin Hoffman, Shia Labeouf — and Coppola’s wife Eleanor Coppola, who shot the footage and directed her own study of her husband’s work for the acclaimed Hearts of Darkness: A Filmmaker’s Apocalypse, about the making of 1979s Apocalypse Now.

He will go...