Because they are the size of the caves. They wouldn't be able to get out.
http://www.wimp.com/spacepainting/ Holy stuff the end result if loving amazing for what he did.
epic. You guys ever see those paintings that were painted to look real? Like somebody made a hole in the sidewalk, and it looked almost real from anywhere above 5 feet.
Derailing my own topic with this but this is epic.http://www.wimp.com/windowsmusic/
http://www.wimp.com/elephantpaints/That is unbelievable.
Those are neat. I was looking at other videos and found this.http://www.wimp.com/amazingpainter/It's somewhat hard to tell what he's painting until the end.
http://wimp.com/createfilm/I win. :)