1. A method, comprising: generating a predetermined pattern generator calibration pattern; receiving an image of said generated predetermined pattern generator calibration pattern; determining the difference of said predetermined pattern generator calibration pattern and said image; generating a pattern correction map for said pattern generator based on said difference; receiving a predetermined object pattern representing a portion of a three-dimensional object; modifying said predetermined object pattern to correct for geometric distortion of a pattern generator; and generating the modified pattern using said pattern generator, said generated pattern interacting with a reactive material to form said portion of said three-dimensional object defined by said predetermined object pattern, wherein the step of modifying said pattern utilizes said correction map.