in 2007 i was working on "paintbrush.es" which was basically this. (i was too cheap to spring for "dra.ws" which costs $1k and may still be available). i thought that by enabling people to do derivative drawing that it would totally revolutionize art, kill deviantart, etc. super creativity! ultimately it was a total failure and all i got were a bunch of penis drawings. i mean art is primal but i wasn't expecting the venus of willendorf