When Sarah Illenberger picks up the phone, the first thing she does is apologize: There’s a loud, repetitive popping noise going off in the background of her Berlin studio, which turns out to be the firing of a staple gun. She doesn’t say what her assistants are constructing with the staples, but it’s clear they’ll be built up by the thousands onto a substrate until their glinting mass reveals some kind of representational image — a skyscraper, maybe, or a ball of tinfoil. Almost all of Illenberger’s work involves using handicraft to manipulate one thing into looking like something else entirely.