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What emerges is a portrait of a man who only intervenes in life when behind the comfort of his camera, whose tripod leg constitutes a clear phallic symbol and without which Mark feels emasculated. It is a direct meditation on the concept of director as both passive observer and active manipulator, while working in various meditations on sex, murder and the cinematic voyeurism that infuses them. We may at first feel in the security of Powell’s assumedly ‘objective’ camera when removed from the vantage point of Mark’s, but as the film progresses it is Mark instead of Powell who emerges as the film’s director; he more or less states that he has willed the events leading up to his own demise as he obsessively films everything he can. Powell bravely identifies with this tortured individual, whose series of grisly murders is, in his mind, the building blocks of a grand work of art that can only achieve fruition in his death. It is one of the great films about artists, and in the running parallels between a large film crew working on an up-and-coming hit and Mark’s own directorial ventures we see in the latter a personal intimacy and nurturing instinct absent in the former (auteur theory encapsulated). Mark’s murder of one of the film’s extras places a morbid irony on the idea of directing actors, and this crops up later when the studio film’s leading actress's reaction to the corpse (placed by Mark in one of the prop suitcases) invariably becomes an extension of her own performance within the film she’s making.
These dissolves of the line between art and reality as they apply to the voyeurism at the heart of the film medium are manifold, even among the notions the film raises about fear and sexuality and childhood trauma. Amidst this swarm of challenging ideas, what lingers longest is the horrific image of a demented perfectionist of an artist leaving corpse after corpse behind until he achieves the right result, which is almost as terrifying as the fact that we can’t help but sympathize with him.