There is a decent thread on infinity chan right now:
https://8ch.net/b/res/6615426.html
-It will probably 404 tomorrow.
-Save the whole page, then use Bing(or another web-image-search) with the thumbnails to research any image further.
I tried to nail down the definition of "art" but couldn't.
It is everywhere, enhancing and describing everything, and using every medium possible.