OptionalcolorColor is represented as a three or four-element array.
OptionalcolorControls how symbolLayer or visualVariable color is applied onto the underlying geometry color/texture. This property only applies to FillSymbol3DLayer within MeshSymbol3D.
OptionaltransparencyNumber value ranging between 0 (no transparency) to 100 (completely transparent).
The material used to shade the geometry.
See https://developers.arcgis.com/web-scene-specification/objects/material/.