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These are pireces I used for a UE4 project. If you want to check it out go to my artstation here. https://www.artstation.com/isaackgamma/albums/1086151
I made the materials in Substance Designer and worked in Maya for the pieces and UVs. I have a few other materials that I used for the Vert Paiting in UE4. You'll need the Substance Plug In for Unreal Engine to use the materials.