My first job in the animation field was as production artist (painter) for the animation segment in the korean feature film, 'A Petal' directed by Sun-Woo Jang. Sung-Yoon Oh was an animation director. The animated spot was used as an insert to describe the korean Gwangju massacre, using metaphors.
Animation was traditionally hand drawn, traced on cells, then oil pastels were applied on sand papered area to create 'oil painting' look.
