Born in 1960 in Linz, he studied psychology and educational theory (1979–83), followed by painting and animation film studies at the Academy of Applied Arts in Vienna (1989–94). A self-taught filmmaker since his youth, he also works in music, painting, installation, and performance. Renoldner has directed numerous experimental, animated, and documentary films as well as commercials, and is active as a producer, teacher, film historian, festival organiser, and curator for animated films.