What is this animated short from?

So I remember watching an animated short a looooong time ago but I can't remember what it was called or what it's from (def not pixar though). It was CG animation, and it took place in this very very cold snowy area in this kind of old looking town. All I really remember was that at one point this little girl is for some reason out in the snow totally freezing out there and I think she like about to fall asleep and die at one point (I at least remember being all sad for her) and I think it started to show how she would live in her imagination with like a warm bed and everything, something about going into her imagination was there. It was sweet and sad I believe. Sorry, that's not much to go on, but I can't remember much else, it was at least 3 years ago that I watched it. I can't remember what company made it or anything. But if you have any ideas on what it might be called please tell me! Thank you :)