As you know, this year's Costume Institute Gala was all about models. The red carpet and parties are no longer, but the Met exhibition — The Model as Muse: Embodying Fashion — will remain until Aug. 9. It focuses on iconic models from the 20th century, and features couture and ready-to-wear pieces, fashion photography, as well as video footage. For those who can't see the presentation in real life, here's a look . . .