I know how to fix it:
If it's happening to you , try to paste the textures of your custom story folder "static_objects/outside/pine/pine_snow" in your amnesia folder "redits/static_objets/outside/tree".
And if it still not working , Well try to play without caring about it --'.
So Now , You have to paste the textures before playing , it'll be more safe.
I'm sorry for people who get this problem :(.
For informations , i'm going to a new city for studies , I'll not got internet for a while , so I'm not going to answer your questions for the moment.
P.S: if you wan't the solutions of Out Of Time , check the other news.