i was trying to track down the same info!! i believe his name is Hugh D'Andrade. his work is also featured on the BRAF flyer that i received at the gate.
http://www.hughillustration.com/
viola!

I was wondering if anyone knows who the violinist that was playing at the Passage art piece on Saturday afternoon was? it was such a beautiful experience. I'd like to thank them :)
brings tears to my eyes when i think of it :)