When you submit a photo to d20.photos and it's approved, your submission is processed and converted into three sizes, then d20.photos creates a computer-generated Abstract image from your submission.
So much of games like D&D or Pathfinder are about the feel of the game while playing. I've often found that artwork, whether sketched, painted, carved, or digitally made helps players and DMs better suspend their disbelief and become more immersed in the world of the game. That said, free-to-use artwork is much harder to find in bulk since artists typically like to be paid, which they should be, and real-world images often lack that certain feel. Computer generated artwork can be a good way to get half-way there.
My thanks to Michael for all his hard work and for letting others build on his code.