The pioneering Brazilian painter and sculptor Lygia Clark once said, “We do everything so automatically that we have forgotten the poignancy of smell, of physical anguish, of tactile sensations of all kinds.” Clark was interested in sensory perception and psychology. She sought interaction between her art and the viewer. In a survey that traces her formative years—1948 to 1958 (she died in 1988)—the first articulation of Clark’s visual language is on view. —E.C.