Oscar "Rene" Weaver was a native of Idaho, born in 1897. He grew up in the upper Snake River country when it was still considered the rugged West. After brief service in World War I, he attended the University of Idaho. He then decided to make art his career and gravitated to Portland, Oregon. There Emil Jacques took him as a pupil. Of him Weaver said "He was great. I was lucky to be admitted to his classes and stayed with him until he left to head up the art Department of Notre Dame University." Weaver continued studying with teachers and anyone who would "go painting". Meanwhile he worked at various art jobs to earn eating money: commercial art, newspaper art staff, engraving shop hack, and advertising agency art director.
In 1934 Weaver was hired by J. Walter Thompson as assistant art director of their San Francisco office. In four years he became head of the department where his duties encompassed the design and supervision of all advertising art for their Pacific Coast offices.
Weaver continued his fine arts studies and at the suggestion of Maurice Logan specialized in watercolor. In Spring of 1959 he opened a freelance studio. He enjoyed a solid reputation as a watercolorist, lecturer, teacher, and juror. His work is represented in many private collections.
Weaver taught at Pescadero Art Ranch, Jade Fon Watercolor Workshop at Asilomar, and conducted classes of his own. He exhibited in American Watercolor Society Traveling Show, De Young Museum, San Francisco Palace of Fine Arts, Palace of the Legion of Honor, Gump's Galleries, Hatchery Gallery, the Crocker Gallery Sacramento, and Frey Gallery Seattle.
- Society of Wester Artists (Past President)
- Oakland Art Association
- West Coast Watercolor Society
- Bohemian Club