Three or more projectors project their respective images to form a composite image. In some cases all three projected images overlap. In order to compensate for distortions in this overlap, blending values are assigned to the projector pixels that contribute to the overlap regions. Pixels that contribute to the overlap of two projectors are assigned a blending value associated with this projector pair. Pixels that contribute to the overlap of three projectors are assigned a blending value that is the greater of the two blending values associated with the two projector pairs, after such blending value has been scaled.