Bay seniors rediscovered the brilliance of painter Richard Diebenkorn last year at the deYoung. A smaller but equally awesome display of his talents, this time on paper, is running at the too-often-overlooked Richmond Art Center through Nov. 16. Joining him will be other heroes from the last flourescence of a regional California style, mid-century stars such as David Park, Elmer Bischoff, Nathan Oliviera and James Weeks. Free admission. Still not satisfied? Check out the paintings by these art heroes now at the Berggruen Gallery in SF.