Two of the Greenskin settlements I worked on for TW: Warhammer 3, I did the terrain & set dressing on these maps and also made/updated several decals. Other people that worked on various parts of the map can be seen below :)
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Terrain Textures, Rocks, Vegetation, Lighting, Skyboxes: https://www.artstation.com/molygon
Lighting: https://www.artstation.com/mr_smo
Vegetation: https://www.artstation.com/michal_gutowski