This is one of the renders that is part of a project. This is very close to a final render but Iām thinking that the ground plane may be a bit to clean and it looks like the snow is a bit to bright so it is loosing some information. Please give me your thoughs 
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Great effort. I would agree with part one of your description about the snow. Maybe you could add foot or tire tracks, like in this video from Blender Guru. You could also add a little variation to the texture on the logs of the house, to break up the uniformity of the house, for instance by mixing with a large pattern noise texture two wood textures reddened with a hue/saturation node.