 John Twiddy created a custom map editor for "The First Samurai" which runs concurrently with "Deluxe Paint" and allows graphics to be loaded in, background graphics to be selected & positioned, and an object's depth to be defined relative to other objects.More features were incorporated into "The First Samurai's" map editor over the course of the game's development, and Docherty stated that "Whenever we want a new feature we simply phone John up and ask him to include it.