When asked if he identifies more as an artist or a designer, Thaddeus Wolfe seems genuinely stumped. But perhaps it’s that way for anyone working with glass, a material that’s notoriously hard to confine: “I don’t think I’m a great designer,” he muses. “Maybe it’s because I’m not a master of glass yet that I never quite get what I intend. But sometimes cool things happen from mistakes.” It’s a pretty self-deprecating summation of process coming from someone whose chaotic, mysteriously opaque Assemblage vases for MatterMade are the subject of a solo exhibition opening tomorrow at Chicago’s Volume Gallery, which has in the year and a half since it opened become somewhat of a barometer for the Next Big Thing.