They look cool..you need to take on more to fill in the square.. yes not too sure of what they are..but interesting enough to have on display..people visiting will have a conversation piece there.
I love these - interesting, textural, ambiguous ... what is it??? I think these would make an awesome arty wall display. I'm sure it's been done before but I've wanted for a long time to do the same with close-ups of different tree barks.
http://www.flickr.com/photos/fortworthbret/5035568991/in/set-72157624934594093/