The primitive shape (primitive) or external 3D model (href) used to visualize the points.
See https://developers.arcgis.com/web-scene-specification/objects/objectSymbol3DLayer_resource/.
Optional
Must be an absolute URL or a relative path starting with "./".
Must be one of the following values: sphere, cylinder, cube, cone, invertedCone, diamond, tetrahedron.
The primitive shape (primitive) or external 3D model (href) used to visualize the points.
See https://developers.arcgis.com/web-scene-specification/objects/objectSymbol3DLayer_resource/.