The advent of computer modeling has allowed architects to generate buildings with decidedly irregular structures, exploring jagged, tilting angles and organic curves. In 2005, Herzog and de Meuron’s de Young Museum, which has a torqued tower and perforated copper facade, heralded the next generation of architectural creativity in San Francisco. Renzo Piano’s remodel of California Academy of Sciences and Snohetta’s bulging addition to SFMOMA and Stanley Saitowitz’s 8 Octavia are more recent additions.