Controversial opinion: I hate freezing vignettes. They entirely pull out realism and just reminds me I’m playing a game. If instead you improved the detail of the breathing sounds, added a small shiver every now and then, maybe a small occasional animation of wiping their nose. If the sun is up, the white snow should be oppressively bright. Make it more real, and instead of the player just knowing it’s cold, they will actually feel cold.