Shibrain was one of the founders of The Khartoum School in the 1960s, a movement of artists who cultivated a new visual style called Sudanawiyya, which expressed local and Pan-African traditions alongside Western influences. Through the use of calligraphy, the aesthetics of hurufiyya (transforming Arabic letters into abstract shapes; named after harf (the Arabic word for letter) and Islamic motifs, the movement attempted to convey the cultural fabric of the Sudan.