The key conventions in horror films include setting, technical elements, iconography, narrative, characters, themes, and music. Settings often involve isolated or creepy locations like forests, abandoned buildings, or graveyards. Technical elements like camera angles, lighting, and editing are used to build suspense and induce fear in viewers. Iconography may include symbols of evil, supernatural elements, or the villain's signature weapons. Narratives usually involve heroes embarking on a quest to defeat a threat, like a killer or monster, often with themes of good vs. evil, the supernatural, or madness. Characters include victims, villains, "stupid" teenagers, and police officers investigating threats. Music and sound effects also contribute