Career
His tri-color carbon prints of original nature photographs were displayed in several United States. photography galleries, featured by an Eastman Kodak exhibition and by the Sierra Club and are included in the Metropolitan Museum of Art"s collections. René revived and perfected the carbon printing process on his own in a small apartment in San Francisco using all hand built machines and also created his own paper. His tri-color carbon prints were noted for their unmatched color, quality and detail, bas-relief effect, and archival permanence.