This paper describes the development of an innovative, material- and energy-efficient facade concept:a pneumatically actuated Origami sun shading system - abbreviated “PAOSS” - which combines theaesthetic and material-immanent qualities of textile materials with the functional aspects of a controlledand targeted light transmission regulation by means of integrated active pneumatic components (Fig. 1).Due to the possibility of reducing a given surface to a minimal form, textile-based folding structures arehighly suitable for selective sun and glare protection systems, in order to optimise energy consumptionand increase user comfort. For astrophysical purposes, the American space agency (NASA) developedan Origami folding geometry called “Starshade,” which is characterised by a particularly high differencebetween its closed and open state. Inspired by NASA’s “Starshade,” an adaptive, pneumaticallyactuated sun and glare protection system was designed and developed to be embedded in the cavity ofpneumatically supported multi-layer ETFE cushion facades. By implementing active components, onecan obtain a targeted, partial, or full-surface regulation of light and radiation transmission as well as theback-reflection properties of the facade. Within the scope of the research project “Adaptive MembraneFacades” funded by the research initiative Zukunft Bau, the PAOSS will be prototypically built at a scale of1:1 and implemented on one storey of the demonstration high-rise building of the Collaborative ResearchCentre 1244 entitled “Adaptive Skins and Structures for the Built Environment of Tomorrow.” The goal isthe system validation and the monitoring of its reliability and efficiency, especially in terms of buildingphysics and daylight performance under real weather conditions.