Thanks for the answer, and i agree with you; the game is at early stage and we keep learning every day, thats why i wrote “…and trying to set up a realistic Antarctic enviroment…” because we still trying to make the enviroment more realistic, we want to reproduce the old Ross Barrier and some beautiful and strange enviroments actually based in real pictures.
Here is one real example of what we wanted to reproduce with back mountains
The video inspired us, thanks for sharing it its true that the design is very realistic, i loved it 
Please all feel free to critic everything you think, thats a very good way for us to learn 
Best regards!