Many people think of Burning Man as a drug-addled party in the desert. And while that's definitely an aspect of the festival, speak to any longtime, dedicated burner and they will stress the importance of "participation." That's the real essence of a trip to Black Rock City. Not to watch the culture, but to help create it. The Pinhole Project's 2013 Burning Man Photo Exhibition is a good place to see this side in action. Each year, the folks behind the pinhole project document the art — and the party — at Burning Man, using an almost forgotten technology known as pinhole photography. A pinhole camera is, basically, a camera that doesn't have a lens, only one small aperture to let in light. The method is over 100 years old, and creates striking, angular black and white photographs. It's a medium particularly suited to the large-scale sculptures and interactive art common at Burning Man. The exhibition is also open on Sunday, just a hop, skip and Muni ride away from the annual Burning Man Decompression party in Dogpatch, which is a good event for folks interested in that other aspect of the culture.