I am making a dungeon, and in this dungeon I want there to be a prisoner behind a keylocked door with no key to talk to the player through bars. The problem is that even though I've placed my prisoner behind the door in the render window in the CK, when I load the dungeon he's usually walking about the dungeon free as a bird.
How do I keep him locked in one location near the door to his cell without allowing him to move at all?