In the Hudson River Valley, on a hill inside the Storm King Art Center, a new addition to the country’s leading outdoor sculpture collection was unveiled this fall. “Lookout,” by the eminent American sculptor Martin Puryear, is a beguiling, domed brick structure with confounding curves, a walk-in entrance, and 90 apertures. The sculpture “could be the most amazing thing Martin’s ever done,” the noted curator John Elderfield told The New York Times. “Lookout” also raises a question: How do you assemble an entirely curving building using rectilinear bricks, of all…
