This is a set of 4 Substance Designer made SBSAR materials available for use in a number of programs like Substance Painter, Unreal, Marmoset Toolbag and Unity.
These materials have many options including the colors, edge wear, dust build up, size, and more.
For best results, use these at 4k texture resolution and reduce the exported textures if needed.
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For more images and video check here: https://www.artstation.com/artwork/z8BzZ