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Ang was taught by a commercial artist at a young age on how to make charcoal portrait. His influence at the time was the artworks of Qi Baishi. After World War II, the family moved to Cotabato. Ang made movie billboards here and later his family moved to Manila, where he attended the University of Santo Tomas where one of his mentors was Vicente Manansala. He studied in the university from 1952 to 1954.