In front of Australia’s Sydney Opera House, a sea of volunteers ditched their duds today (March 1) to participate in U.S. photographer Spencer Turick’s latest art-photo shoot.

People of all ages, backgrounds, shapes and sizes posed for Tunick, who has made a name for himself shooting nudes in public places.

“It doesn’t feel sexual,” said someone who gave his name as Art Rush. “I thought it would be all old people and nudists, but everyone here is great.”