Ian Thuillier’s debut documentary is a moving tribute to his late bother, fine-arts photographer Harry Thuillier. With unusual access to his subject’s life, Thuillier constructs an intimate, deeply moving portrait of an artist on the edge, from his earliest days as a student in the United States (including a brief stint at Mass College of Art, Boston) to his tragic and controversial death in Italy from an overdose of heroin. Exquisitely made and sensitively told, Darkroom probes deep into its troubled subject, providing insight into the artistic imagination and the disaffection and loneliness that often accompanies it.