I recently lent one of my computers to my daughter, and to be fair she asked if she could change the desktop background to something she liked and I agreed.
She used one of the images that I have for my screen saver as one of a rolling series.
When I went to use the machine I found the following display, which, by the way is of the sun shade on Auckland Savings Bank's head office building - I liked the pattern, but really how do you find your icons on this? I asked, and she confirmed that it IS the background she used:
go figure...