Ok, here's one that might stump you. "Might" being the operative word here.
Sporadically, I've found pictures of the half-animal variety (implied change or just plain animal-people, not process) - and some TG - with the author/website watermark "OMC" (possibly "OMG", but it's hard to tell) in a yellow box in a corner of the image. I'll give you an example:
http://prcaps.zidev.com/art/fishgirl.jpg
I don't know if anyone's ever found a site that these pictures call home, but I'd be very grateful if there was.