Over the weekend at Joshua Liner Gallery in Chelsea, NYC, California-based artist Thomas Campbell opened his solo show “Ampersand,” bringing with him a calm from the Pacific that seemed disorientingly refreshing in a city that breeds anxiety. Campbell, who is as much a painter as he is a filmmaker, skateboarder, surfer, record-label founder and photographer, continues to defy the mainstream pressures of specialization and containment, a shared temperament for many of his fellow artists that emerged in the 1990s — the Beautiful Losers such as Barry McGee, Cheryl Dunn and Harmony Korine.