Hey pal, i don't wanna be a bother but these assets are stripped right from the long dark... did you get permission from Hinterland games to use their assets on something you could make money from?
Viewing post in Christmas Mystery II comments
This is the asset that I used to create the enviroment https://assetstore.unity.com/packages/3d/vegetation/story-northern-nature-164556
In this asset i only changed the trunk texture so it fits the cold winter style.