These are the materials used in my latest project "The Signal". It was very nice and fun to work on them. I used zbrush for the forest root ground material to sculpt the base, and for the foliage and leaves. For the metallic trimsheets I modeled the base and did the bake/texturing inside Substance Painter. All of the landscape materials are using height maps and tessellation for terrain displacement.
I hope you really like it!