Herwig Baumgartner, Scott Uriu discuss with Eric Owen Moss the imagery, analogies and interpretation of their Apertures installation. They debate the interactive audio component of the project, touching on the meaning of interactivity in architecture, and the role of sound in defining a space. Baumgartner and Uriu discuss the evolution of their design for Apertures, stressing the thin sheets of thermoplastic polymer resin laminated to CNC-milled polyurethane foam used to make the shells. Moss proposes Félix Candela as an analogy. Baumgartner argues that their project was less about maximizing structural efficiency than minimizing poché.