“It’s like looking into something very deep. You could fall in.” So said a transfixed account exec about a Rothko painting in an episode of “Mad Men.” Such a reaction could also be provoked by the colorful, abstract paintings of Shawn McNulty, whose newest works will be on display in a split show with Scott Wenner at Rosalux. Though the depth of color in McNulty’s work seems to reference Rothko, his canvases lack the abstract expressionist’s soft edges; instead, each piece is distinguished by gritty brush strokes, horizontal lines and distinct division of color. For his part, Wenner will exhibit a new series of ink and layered gouache paintings of ruined structures that reflect themes of defeat and destruction. – Jahna Peloquin