Metalness
warning
It is considered to be removed. Please use Directive instead
specifies metallic property of a graphics primitive (see MeshPhysicalMaterial)
Metalness[i_Real]
where i can be between 0 and 1. In real world it either 1 or 0.
An effect is more visible, when there is an HDR map is used
non-metallic
Graphics3D[{Metalness[0], Sphere[]}, "Lighting"->None, "Lightmap"->"https://raw.githubusercontent.com/JerryI/Mathematica-ThreeJS-graphics-engine/master/assets/PureSky.hdr"]
metallic
Graphics3D[{Metalness[1], Sphere[]}, "Lighting"->None, "Lightmap"->"https://raw.githubusercontent.com/JerryI/Mathematica-ThreeJS-graphics-engine/master/assets/PureSky.hdr"]
metallic and polished
Graphics3D[{Metalness[1], Roughness[0], Sphere[]}, "Lighting"->None, "Lightmap"->"https://raw.githubusercontent.com/JerryI/Mathematica-ThreeJS-graphics-engine/master/assets/PureSky.hdr"]