DAILY PIC: “Skylight 1” is one of my favorite pieces from Diana Cooper’s solo show at Postmasters gallery in New York, which locals have one more day to catch before it closes. In this piece and others, Cooper takes a real feature of the Postmasters interior and shifts the place and shape it takes up. This new tactic gives a firm, real-world grounding to the fantasy that Cooper’s always revealed in her work. It’s also a kind of homage to Postmasters itself: For almost three decades, in one space after another, owners Magda Sawon and Tamas Banovich have given artists room to do the most daring work they know how. It’s nice that there’s now work that’s about the room given.