Double Indemnity- Amanda Carman

First of all, the majority of this scene is very low-contrast, giving it the murky quality mentioned in the prompt.  It is more difficult than in past films we've seen to discern exactly where his coat ends and the curtain behind him begins, and where the curtain ends and the wall begins, despite this scene taking place during the day.  Secondly, the brightest elements of this particular screenshot are the strips of light cast on Walter, which create a pattern reminiscent of iconic prison garb.  Thirdly, he is placed facing the camera in a way that seems to break the fourth wall, but the shot is from a medium-long distance.  These three elements each emphasize a different aspect of the film noir style. 

The low-contrast lighting embodies the genre's tendency toward the darker, more morally depraved themes and its ability to place morally abhorrent characters in a more ambiguous, murky place in audience sympathy.  In this film in particular, we know from the beginning that Walter is a murderer, but still find ourselves connecting to him.

The strips of light not only foreshadows this moment (right after meeting Phyllis) as the one that begins to trap Walter on the metaphorical motorcar of murder, but also reflects the genre's franker side.  Film noir is characterized by how much is revealed in voiceover narrative; typically no motivation goes unexplained, no action is unpredicted by the narrative.  This is such an iconic feature of the genre that the improv game by the same name has only one rule different from a regular scene: the characters must step out of the scene and explain their secret motivations or what they were planning on doing next.

Walter's placement emphasizes the characteristic of the indirect address to the audience; in this shot he is facing the camera, looking out at the audience, but he is not close to us.  Similarly, in the voiceover his comments serve to address us directly (explaining the flashbacks as they happen), but because they are spoken into a recording device meant for his boss we are still distant from him; he establishes no relationship with us even while speaking to us.