The Tehran Canopy was simple membrane installation for a private client. The project started with a conversation about the restoration and refurbishment of an outdoor space. The brief came in two parts; the first required us to look into how we could use membranes to create privacy, whilst maintaining views, and the second as a decorative element within the interior, which would enable the refraction of light further into the floor plate. The project required intense computational and material research to gain enough control to enable us to respond to the brief. A parametric definition and computer code were used to derive a dynamic definitions, which enabled us to efficiently test alternative arrangements for the refractive surface or membrane. The parametric model, in parallel to the environmental analysis, combined with materials behavior allowed us to design an optimized surface. Membranes have traditionally represented the simplest and quickest form of creating enclosure within the vernacular architecture of Iran. Here, when combined with advanced digital tools, we can derive further properties and performances from this simple element. Key words Algorithmic design, Generative design, Parametric design, Digital optimization, Contextual design, Performance orientated design, installation.