Visitors explore Robert Irwin's Scrim Veil--Black Rectangle--Natural Light during its 2013 reprise at the Whitney Museum of American Art. ©Robert Irwin/Photography ©2013 Philipp Scholz Rittermann/Courtesy of the Whitney Museum hide caption

itoggle caption ©Robert Irwin/Photography ©2013 Philipp Scholz Rittermann/Courtesy of the Whitney Museum