(List of possible inspirations and similarities.)
Silent Hill 2: Maria is a woman who dyes/bleaches her hair (unnatural hair because color is changed), whose personality changes unpredictably, and who grows attached to James over the course of the game. She works as a performer in a bar.
Blue Velvet: Dorothy is a woman who wears a wig (unnatural hair because it’s a wig), whose personality changes unpredictably, and who grows attached to Jeffrey over the course of the film. She works as a performer in a bar.
Silent Hill 2: Heaven’s Night,. same stage/curtains as bar in Blue Velvet
Blue Velvet: the bar where Dorothy sings.
Silent Hill 2: Angela, a victim of sexual abuse whose family is missing, wields a large kitchen knife
Blue Velvet: Dorothy, a woman whose husband and child are missing and who is suffering sexual abuse from Frank, wields a large kitchen knife
Silent Hill 2: Blue Creek Apartments, where James first meets Pyramid Head.
Blue Velvet: Deep River Apartments, where Dorothy Vallens lives.
Silent Hill 2: Pyramid Head moves kind of drunkenly (Ito says movements inspired by drunk people in Making of SH2), abuses monsters and attacks James, and James shoots at him from a closet where he’s hiding. Represents a different side of James, and makes him realize his guilt.
Blue Velvet: Frank huffs drugs and sexually abuses Dorothy, beats up Jeffrey (also tells him “you’re like me” which underlines the idea of them as different aspects of the same whole, and in sh2, angela says this to james), and Jeffrey shoots at him from a closet where he’s hiding.
Hiding in the closet.
Shooting from the closet.
-There is a great contrast between the 2 women in James’ life: Mary and Maria. Likewise, Dorothy (Isabella Rosellini) and Laura Dern’s characters are quite different.
-In the beginning of the movie, Jeffrey finds and ear (used to hear, important in communication). It leads him to go looking for Dorothy. In the beginning of SH2, James gets a letter, finds a radio, and later, a set of headphones, all tools of communication.