Presented by Transsolar and Tetsuo Kondo Architects at the recent Venice Biennial of Architecture, indoor clouds were formed by stacking a warm humid layer (25C, 100% RH) between a lower cool dry layer (18C, 40% RH) and a higher hot dry layer (37C, 60% RH). Although technologically different, it invokes images of Diller and Scofidio’s 2002 Blur building and Cai Guo-Qiang’s pyrotechnics.