JP: What are the conventions of horror genre, thriller genre and noir style?

Horror
- Low-key lighting
- Thunder & lightning
- Selective sound: heartbeats, breathing, footsteps and door creaks
- Flashbacks
- Blood & gore


Thriller
- Jump cuts
- Montage editing
- Discordant soundtrack
- Selective diagetic sound
- Low-key lighting
- Suspense & tension building


Noir
Double Indemnity (Wilder, 1944)

- Shadows (often of Venetian blinds and bannister rods)
- Shot at night
- Low-key lighting
- Partial obscuring of characters
- Trench coats with the collar turned up and a hat
- Lamps
- Femme fatales (usually smoking)
- Flashbacks