Roy Krenkel Original Art - After World War II, Roy G. Krenkel took art classes taught by Burne Hogarth. However, his contributions to the comics field remain limited, since he never created a comic on his own. In fact, Roy Krenkel specialized in drawing backgrounds. He assisted famous names such as Frank Frazetta, Al Williamson, Wallace Wood, Joe Orlando, Gil Kane, etc. His credits include series like 'Adventures into the Unknown', 'Forbidden World', 'Marvel Tales', 'Weird Fantasy' and so on. After a while, he abandoned his comic activities and devoted himself to illustrating, most notably cover illustrations for books by Edgar Rice Burroughs and Otis A. Kline.