Photomosaic software has been around for nearly two decades. Way back in the day folks tinkered with this technique completely by hand just as we did with colored hole punches in Color Theory class in college. The road was very tedious, but the end results can be astounding when one takes the time to view from afar as well as appreciate all of the closeup details.
I recently experimented with cf/x’s Photomosaic. This was my first test right out of the gate with default settings. The tile rotation option really helps give this image a greater sense of depth. I’ll post additional examples when I have more time to experiment.