Doors and windows that define the confine between inner and outer worlds and the threshold that sanctions the limit between environments lie at the base of any architecture project. They identify belonging, inside and outside; they integrate and exclude. By definition, a limit may be transient or open and favour exchange and osmosis. If there’s a designer who has constantly interpreted the idea of partition between environments as a fluid concept, it’s the Dutch Petra Blaisse. Working in the prolific crossroads between interior and landscape design, Inside Outside — the studio she opened in 1991 — creates interventions in which the notion of permeability is key. Known for the gold curtain at the Nederlands Dans Theater, 1987, and for the textile installation for Maison à Bordeaux by OMA, 2012, as far as landscapes go she recently completed the Biblioteca degli Alberi in Milan. In her work, the demarcation line takes shape in the form of textile partitions that outline a very light, non-permanent confine that always invites inside and outside, interacting with the light, weather, nature and change. A visual confine that moves, that is manipulated by the people who inhabit these spaces.