IT REQUIRES REAL TALENT to design costumes from a bygone era that will look great in close-up on film. But it takes a special kind of genius to ensure those clothes look equally good soaking wet. Given that enormous task, costume designer Deborah Lynn Scott dressed the main characters plus 150 regular extras with many, many looks (rich folk changed outfits frequently each day at sea). The scene in which passengers embark in Southampton—some headed for first-class cabins, others for steerage, a distinction evident in their appearance—called for 8,000 separate pieces: coats, vests, hats, gloves, dresses, shoes and more, all appropriate to the Edwardian-era setting.
When possible, Scott restored vintage garments and added old trimmings like lace and beads to new designs. To withstand the water, she and her team made…