The mesh smoothing is controled via Normal Vertices. Model should be imported in a game engine with tangents and binormals option selected.
4K PBR maps: Albedo, Normal and Roughness... no metallic texture just use a value of 1 for your metallic value inside the shader.
Contains also 4K baked maps if you want to make your own materials in Quixel or Substance Painter: Material_ID, Normal, Curvature and Occlusion.
Previews are from Quixel 3DO.
Cheers!

Formats:

Autodesk FBX (.fbx)240 KB