This group was created for the purpose of gathering concept artists who love working with mods and those who look forward to joining one.
Environments for a small snow based CTF map called Ice Pick.
Development seems to be running with selected buildings from panel one two and three, with the greenish hue of panel 4.
I like #4 the best. Simple structures convey a hostile environment. Good stuff!
That's subjective though. I think context plays a big part. For example, a huge & intricate building can be intimidating and overpowering. If it's clean and tranquil, or rustic and damaged, these can be factors to hostile or not. There are many shades of grey. Anyway, these looks like promising ideas. Nicely done.