With a challenge to make a series of random ephemeral public spaces using a simple structure in the Seattle Center, the intervention by Hoshino Architects proposes areas of such spaces to be transformed to voids and purely leave the circulation spaces on the ground level. In contrast, the public contents circles are randomly scattered on the field level. As normal urban spaces, the circulation spaces sometimes change to unexpected functions, such as a viewing gallery for the event staged at the field level. This dual layer structure intertwines and creates the complex ‘Porous-scape’. More images and architects’ description after the break.