this mentions the importance of a strong naming convention. how ironic that the naming convention has been CHANGED and the script in the video will give nullreference errors with the current tutorial asset pack. it needs updating.
door_exitOuter_left_001 is now door_exit_outer_left_001
door_exitOuter_right_001 is now door_exit_outer_right_001
door_exitInner_left_001 is now door_exit_inner_left_001
door_exitInner_right_001 is now door_exit_inner_right_001