A Glance and All That It Contains Imagine you're the costume designer for a major film, and the director has just handed you a single photograph from the 1940s — a black-and-white still of the lead actress. Your job is to recreate her exact look: not just the silhouette of the dress, but the precise way the fabric catches the light, the specific shade where her collarbone meets her neckline, the way individual strands of her hair fall across her shoulder. You pore over that photograph for hours, mentally answering dozens of separate questions: Where does her left arm end and the fabric begin? What angle does her wrist make? Is that texture wool or silk? Now imagine asking a machine to answer all of those questions simultaneously, for any photo of any person, in less than a second. This is the challenge at the heart of Sapiens2, a new system released by researchers at Meta.…