When Phuong Mai Nguyen first landed in Southern California , she was struck by the sunshine. The Vietnamese-French filmmaker had signed on to direct an animated adaptation of  In Waves , AJ Dungo’s hit 2019 graphic memoir, and traveled across the Atlantic to meet her subject — and immerse herself in his world. “It’s weird because in France we don’t have that kind of lighting all the time — now it’s springtime, but we still have gray skies,” she says. “The light [in Los Angeles ] was amazing.” You can feel that direct inspiration all over  In Waves , Nguyen’s feature debut, working off of a screenplay by Fanny Burdino and Samuel Doux. Expanding on the visual style of the original book, the movie draws heavily from nature to tell the bittersweet love story between teenagers AJ and Kristen, whose bond is strengthened by a shared love of surfing.  The water is its own character here, in its adventure and natural beauty and stormy volatility.…