Labyrinths became a motif for the film to represent Hellboy's conflict of "choosing the right path." This was reflected in the film's opening titles. Del Toro felt that labyrinths represent the film's themes regarding "choices and taking different turns and choosing different destinies," Del Toro stated, "A labyrinth, it is said, is not a place to be lost, but a place to find yourself." Del Toro chose to add context to the BPRD logo by rooting the film's version in Catholic mythology by adding archangels in Broom's office. Del Toro wrote Hellboy's dialogue with Perlman in mind for the role, prior to casting him. Del Toro noted that he tried to emulate Jack Kirby and Harryhausen's action style for the film's action scenes.