Iain Forsyth and Jane Pollard's documentary about Nick Cave is a cool spellbinder with a gloomy-daydream flow that stages a day in his creative life. At the movie's dark heart is the disarming self-awareness and intelligence with which Cave cops to raiding, mythologizing, and cannibalizing his memories, be they exquisite or banal. The mystique endures, as does some very practical wisdom on the matter of how to be an artist.