He will receive his commendation during the 18th edition of the festival (Oct 3-12, 2013).
Previous work includes "Rice People," "S21 The Khmer Rouge Killing Machine" and "Duch Master of the Forges of Hell."
"The Missing Picture" sees Ranh recreate scenes from Cambodian history using models after he found accurate documentation to be missing or destroyed.
Busan said it is recognizing Panh for "his well-made works and remarkable accomplishments in education and cultural records."
Previous recipients have included Yash Chopra, Edward Yang, Andy Lau and Mohsen Makhmalbaf.
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