Leigh St. Maur Stocker, a Southern California photographer and artist who died five years ago, never sought exposure for his work, which ranged from still lifes of Camel cigarette packs to evocative photographs of gladiolas to nudes. But his brother, San Geronimo valley resident Michael Stocker, wants to spread Leigh’s works, which involved painting on his photographs. “I have like 600 pieces…I have to get them out into the world and show them,” said Mr.…