Some artists travel to Flax to get materials; others never get farther than their neighbors' trash cans. For the latter type, the golden gig is this program. Not only does the lucky artist get carte blanche to rummage through the city dump, a monthly stipend, and a 2,000-square-foot studio to work in, he also gets a solo show with pretty much guaranteed press coverage (nobody can pass up the garbage angle). Since 1990, more than 50 artists have filtered through the waste, and although shows last for just two days, the pieces have a habit of popping up around town — Andrew Junge's full-size Hummer, made entirely out of Styrofoam, motored to City Hall and now resides at the Exploratorium.