This is a drawing of Leon from the movie Leon the Professional (highly recommend it). Which is now my 3rd white on black drawing, I learnt a lot from this one. White pastel is great when trying to achieve smoother tones such as skin, a lot easier then trying to do so with white pencils or charcoal pencils. I also used a combination of white gel pens and pencils for highlights in different areas.
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Callum Warren 