Instead of file grain they should use dithering if they want to remove banding.

The film grain doesn’t really hide the banding that well.

I think the film grain is just to make it look like a film not to hide color banding.

I recently finished psychonauts 2 on the steamdeck connected to the dock. It ran almost perfectly. Some areas that had a lot of activity would drop a bit, but overall it was an amazing experience.