After liberation in 1945, Chang Ucchin briefly worked for the
National Museum of Korea until 1947 where he was able to learn about
traditional Korean art and was inspired by traditional paintings, woodworks, and crafts. From 1948 to 1952, he participated in group exhibitions of the New Realism Group (Sinsasilpa, 신사실파, 新寫實派) with fellow members such as
Kim Whanki,
Yoo Youngkuk, Lee Kyu-sang (이규상, 李揆祥, 1918–1964). The New Realism Group was focused on re-examining the direction of Korean modern and contemporary art by experimenting with new aesthetics and forms, as well as incorporating newly translated Korean traditions to modern elements. During and after the
Korean War, Chang Ucchin made use of the limited resources he had and produced several key works such as his self portrait,
Boribat (보리밭, Barley Field, 1951), and
Narutbae (나룻배, Ferry, 1951), of which the latter was painted behind Chang Ucchin's own beloved piece,
Sonyeo (소녀, Girl, 1939) as he could not access canvases easily after the war. His years in refuge at Busan during the war was the only time cityscapes appear in his paintings. For instance, he painted clusters of houses in the city, as well as a car, bicycle, and Western-style house in
Jadongcha ga itneun pung-gyeong (자동차가 있는 풍경, A View with a Car, 1953). He became a professor of fine arts at
Seoul National University in 1954, but resigned to paint full-time from 1960. == Deokso Period (1963–1975) ==