Inspired by the transformation process of rusting and ecological gradientsof daylighting, our tower twists and modulates from a thin, fl aky characterto a sharp, solid condition as it rises from Battery Park City. Facadeporosity varies in response to environmental simulations and incident solar calculations becoming more open on the north face, while more enclosed on other elevations and distribution of program is informed by interior daylighting levels. The concrete core, composite slab and complex lateral bracing are clad in Corian panels, which were thoroughly studied for curvature and seaming to delineate and accentuate continuity of flow from floor to wall to window mullions to ceiling.Published in Evolo “Skyscraper for the XXI Century”