A method generates a composite image by painting unfilled regions between micro-objects
with other micro-objects to create a multiple layer effect. Another method generates
a composite image from as few as one micro-object by changing the average color
and/or intensity of the micro-object to match that of an area on the source image.
Yet another method quickly generates a preview image of a composite image by saving
the micro-objects in multiple resolutions so that the micro-objects at the small
resolution can be quickly scaled to build a preview image of the composite image.
