In what ways might the character of Walter Neff be considered an anti-hero?

Do you think Double Indemnity is a love story? How would you describe the relationship between Walter Neff and Phyllis Dietrichson? Or between Neff and Barton Keyes?

Then:

Choose one of the following questions to respond to:

In what ways might the character of Walter Neff be considered an anti-hero?

Compare Double Indemnity to a film noir-style movie that was shot within the last ten years.

How is the content of Double Indemnity enhanced by the visual style?