Hey Lostclimate, try to reduce the lights a bit its a bit to strong. Maybe add a "hemi" light to get more atmosphere. Maybe change the Light color to an"warm Yeallow" ?! At the last Picture: Please remove this green "dirt" (?) it looks wrong to me (Color is to strong in my opinion).
regards Sebastian
Tutorials: [Blender]Terrain creation ENG/GER [Blender]Low Poly Tree Modeling [GIMP]Create a Texture for Terrains CLICK HERE