Josh Safdie directed and co-wrote “Marty Supreme.” He also co-directed (with his younger brother, Benny) and co-wrote “Uncut Gems.” Like the heroes of those films, Safdie is a native New Yorker and a very fast, very entertaining talker. He demonstrated this one recent morning, when he arrived at Two Palms, a sprawling printmaking studio in SoHo where he was set to sign, number, and date a run of silk-screen prints that he’d created in collaboration with the studio’s artisans. The prints, fifty in total (plus multiple artists’ and printers’ proofs), were laid out in tranches of six on carefully prepared worktables. Four Staedtler 2B pencils were ready to go—sharpened and then slightly dulled, to prevent puncturing the paper. (Safdie, who is particular about writing implements, had test-driven possible pencils earlier.) Small talk was dispensed with quickly, but then the director, forty-two years old with collar-length hair and a beard that stops just shy of scraggly—you could add him to the cover of Dylan and the Band’s “Basement Tapes” LP and no one would notice—began reminiscing about a nearby office he’d had years ago, in the same building as “Greta and Lena.” And bingo: he was off on a ping-ponging monologue....