There are quite a few places in the level where the ambient dark areas are coming up too dark for my liking. my footprints are almost black which works ok where the snow looks thin as in the screenshot below, but in other areas doesnt look quite right. You can see how dark the rocks are in contrast to the snow in some of the shots, but some of the effects are just gorgeous. The floating ice is great and I felt cold falling into the water. I did want to shoot up the ice though and feel that would be doable quite easily.
Here are some screengrabs of things running on my machine, first some shots of the Forrest level, not sure if it has changed much and then of the new Forest_Winter which has the snow weather effects and extra elements throughout.