Think of a room with a window onto a garden. Inside is a shy, retiring painter whose unfinished canvases—bowls of fruit, a soft burst of flowers—are tacked up on a wall. In Pierre Bonnard's lifetime (1867-1947), his work was often dismissed, even denigrated (famously, by Picasso), as too derivatively Impressionistic, unsuited to the aggressively modern 20th century. But now, Pierre Bonnard: The Late Still Lifes and Interiors takes a fresh look at this stealth innovator who painted from memory, creating rooms whose occupants seem to materialize hazily, like sun-washed ghosts—an artist whose radiant paintings domesticate the fleeting effects of light.