The RISD Museum was partially closed off, and therefore free. Not a bad deal. The main event was a first floor exhibit of styrofoam-based works, including a couple of wall-hangings by Sol LeWitt. Not uninteresting.
But what really got me was something I saw upstairs. There's a smallish, wood-panelled room filled with surimono, privately commissioned Japanese woodcuts, albeit not the ones in the link. As pictures, these tend to be incomplete, with pictographic text sprinkled where the background would be. But the more you look at them, the more they have all they need.