Horror film conventions typically involve characters like a killer with a troubled past and recognizable murder weapon, and victims that are either virgins or promiscuous. Visually, horror films often use dark colors and low lighting. Common iconography includes haunted houses, symbols of death, disfigured faces, screaming victims, and murder weapons. Themes typically involve good versus evil, religion, childhood issues, revenge, the supernatural, and madness. Settings are usually scary places that envelop audiences in the genre's conventions, like forests and haunted houses.