In a coincidental prelude to “The Geometry of All Four Seasons,” an exhibition of Martin Bennett’s new oil paintings, the doorway of Clint Roenisch Gallery was littered with maple leaves. Suggestive of a loose grid in faded tones of brown, rust, green, and gray, the leaves provided a fortuitous tactile complement to the largest picture on view, Static Image Painting/Brown/Boat/Villa Borghese, 2006–2007. The work features a not-so-scenic nature scene based on a photographic image—taken, as the title makes plain, on the grounds of the famed Roman museum—featuring birds, a man rowing a boat, and