1. A system for generating Z-buffers in a camera, comprising: an image capture device having a plurality of pixels; a variable transmittance shutter configured to expose the plurality of pixels on the image capture device to a modulated light signal reflected from different regions of a scene adjacent the camera during different delay cycles; and a processor operatively associated with the image capture device, the processor generating a Z-buffer for the plurality of pixels based on the modulated light signal reflected from the different regions of the scene during the different delay cycles.