It's a movie of ideas rather than spectacle (Philip K Dick's dreamy electric sheep are inevitably invoked) with some well realised visual effects (a la Ex Machina) giving it genre legs.

Sadly, this flubs the landing with a banal and credulity-stretching finale that feels like a bad Twilight Zone episode, but the first hour or so is terrific.

Pity the poor actors trapped in a cinematographer's world.

For a movie full of surprises in its narrative, there are none beneath its surface.