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The underground filmmaker that Donyale Luna collaborated with is Andy Warhol, a prolific figure in the art scene during the 1960s. Luna's partnership with Warhol involved working on several of his experimental and influential films. Warhol was known for his groundbreaking artistic style, often incorporating unconventional techniques and challenging traditional notions of filmmaking, making their collaboration a significant moment in both Luna's career and the broader underground film movement.