
There aren't many horror films that tells the story of a ghost and the effect of a war. Director Guillermo Del Toro really created a movie that has two totally different themes in itself but the themes come together. Guillermo said The Devil's Background was the most difficult hybrid of genres, which was part war movie, and part ghost story.
There were only two sets in this film, the Orphanage and the Town which was miles away from the orphanage. The Orphanage was a made up of old rugged buildings that surrounded an interior courtyard. Because the orphanage was in the middle of the desert I think this showed how the boys were isolated from anybody other than the workers in the orphanage. There were different sets inside the Orphanage like the kitchen, the hall where all the boys slept, and the rooms where the caretakers slept. I thought the basement with the high-celling hallways and cellars was very successful at being creepy. At anytime anyone could appear from behind one of the cellars and doge behind another without being seen.
Sound played a huge part in the movie. I think the sounds are a big part in what makes you jump when something pops on the screen out of nowhere. I don't think that when Carlos was in the closet and the ghost popped into the keyhole anyone watching would've jump if there wasn't any sound to back up the suspense. Sounds also helped add to the creepy factor of the movie like the sighs of the ghost and the music that is playing whenever the ghost is in a scene.
The special effects in the film were very great, but I though anybody with a brain could have noticed that the fly at the end buzzing around the Doctor's face was computer animated. Other than the fly all the other effects were fantastic, the ghost of the little boy was perfect. I especially liked when Carlos was running from the ghost and he hide in the closet, then the suddenly the ghost popped his eye the keyhole. I thought this was both a moment that made you jolt, and a moment where you could see how well the effects of the ghost's eye were.