I am looking for one specific wallpaper that I'm sure is from either Ubuntu (Wily/Unity) or Enlightenment (e20). I've had this combination of Ubuntu/e20 for about half a year before switching to Bodhi. (It might have been e19, not 100% sure anymore.) Everything's fine, except ... I loved that one wallpaper, but I can't seem to find it again.
The picture was a horizonless close-up of a piece of rock, really just the surface. Its colour was a dark brown that was almost red, like the stone was rich in iron, and it seemed have a raw surface, similar to sandstone. Iron ore maybe?
I downloaded at least 20 Ubuntu wallpaper packages that didn't sound too esoteric, I looked up e17-stuff.com, and I ran several search engines on a dozen different combinations of the wallpaper's theme. But seeing the number of Iron Man, kitschy zen art and rock music fans out there, googling for [[iron, stone, red, rock] free] wallpaper gave very different results than what I was hoping for.
How can I find that picture? If it was not Ubuntu, but Enlightenment, where can I find out which packages/picture sources they use?