Hmm, this is strage, I'm getting mixed results. Battle004.bb is deceptive because you start *inside* the castle mesh, so that's why you can walk through it - however in my code my castle doesn't seem to block the player.
Please try the battle003.bb code and let me know if you can walk through the fence.
Please try the battle003.bb code and let me know if you can walk through the fence.