I will give my small terrain review also.
Terrain one:
Lovely piece of art you have there. It actually looks like swamp. Lightning is well and looks bit poisoned, thats good. Now some critisism.
I personally think that you should do something with those trees. Thats because it seems unlogical that tree stands on its roots. Low the trees or put some rocks under the roots to make it look better. Aslo if you look carefully, you see that the dead body is hanging in air, cause the rope seems broken at one place and makes it unreal.
Terrain two:
Very interesting work. Its very hard to comment this picture. So i wont, lets just say it look good xD.