A three-dimensional printing system which forms a three dimensional article of manufacture through a layer-by-layer process with layers formed by selectively curing photocure resin onto a face of a three dimensional article of manufacture comprising: a vessel for containing the photocure resin; and a plurality of light engines including at least a first light engine and a second light engine, the first light engine includes a first light modulator defining a first rectangular array of pixel elements that define a first build field, the second light engine includes a second light modulator defining a second rectangular array of pixel elements that define a second build field, the first build field and the second build field overlap along an overlap zone, the first light engine is configured to: (a) receive a first incoming slice energy data array corresponding to the first build field; (b) process the first incoming slice energy data array to provide a first scaled and corrected data array corresponding to the first rectangular array of pixel elements of the first light engine, the processing includes applying a first transparency mask to the first pixel elements within the overlap zone, the first transparency mask defines a transition zone between two extended threshold zones (34A, 34B), the extended threshold zones (34A, 34B) include a first extended threshold zone that is proximate to an the edge of the first build field, the first transparency mask has first transparency values that are below ten percent in the extended threshold region; and (c) deliver optical energy to the first build field based upon the first scaled and corrected data array to selectively cure the resin, wherein the first light engine is further configured to format the first scaled and corrected data array to define image frames and to deliver the image frames to a digital mirror device and wherein the formatting the first scaled and corrected data array includes converting a pixel element energy value to a binary number that represents a sequence of bit planes. a vessel for containing the photocure resin; and a plurality of light engines including at least a first light engine and a second light engine, the first light engine includes a first light modulator defining a first rectangular array of pixel elements that define a first build field, the second light engine includes a second light modulator defining a second rectangular array of pixel elements that define a second build field, the first build field and the second build field overlap along an overlap zone, the first light engine is configured to: (a) receive a first incoming slice energy data array corresponding to the first build field; (b) process the first incoming slice energy data array to provide a first scaled and corrected data array corresponding to the first rectangular array of pixel elements of the first light engine, the processing includes applying a first transparency mask to the first pixel elements within the overlap zone, the first transparency mask defines a transition zone between two extended threshold zones (34A, 34B), the extended threshold zones (34A, 34B) include a first extended threshold zone that is proximate to an the edge of the first build field, the first transparency mask has first transparency values that are below ten percent in the extended threshold region; and (c) deliver optical energy to the first build field based upon the first scaled and corrected data array to selectively cure the resin, (a) receive a first incoming slice energy data array corresponding to the first build field; (b) process the first incoming slice energy data array to provide a first scaled and corrected data array corresponding to the first rectangular array of pixel elements of the first light engine, the processing includes applying a first transparency mask to the first pixel elements within the overlap zone, the first transparency mask defines a transition zone between two extended threshold zones (34A, 34B), the extended threshold zones (34A, 34B) include a first extended threshold zone that is proximate to an the edge of the first build field, the first transparency mask has first transparency values that are below ten percent in the extended threshold region; and (c) deliver optical energy to the first build field based upon the first scaled and corrected data array to selectively cure the resin, wherein the first light engine is further configured to format the first scaled and corrected data array to define image frames and to deliver the image frames to a digital mirror device and wherein the formatting the first scaled and corrected data array includes converting a pixel element energy value to a binary number that represents a sequence of bit planes.