The final step in the adaptation of the comic book was making sure that the world the "Hellboy" characters occupied fit the bill. Stephen Scott was brought in to build that world.
Stephen Scott's production design took its cue from Mignola's comic books, but also expanded it by blending it with the Gothic environment of the film's Prague shooting location.
In order to coordinate his efforts with del Toro's vision, Scott came up with a method to ensure that all the films tricky shots would be possible in the sets he planned. Scott made sketches and models of all the sets before building the full-scale sets and outdoor locations to suit the film. He then used a mini camera that was plugged into a TV monitor. This mini walkthrough gave both the Director and the Director of Photography an idea of which shots were possible on any given set.