/// <summary>
/// Adds a textured sphere with the given material assigned to it
/// </summary>
/// <param name="material">The material to assign to the sphere</param>
public void AddTexturedSphere(Material material)
{
// create sphere
var sphere = new Sphere(Plane.WorldXY, 2);
// add material to material table
var index = AddMaterial(material);
// add sphere to object table
var id = _doc.Objects.AddSphere(sphere);
// get sphere object
var sphereObject = new ObjRef(id).Object();
// assign material
sphereObject.Attributes.MaterialSource = ObjectMaterialSource.MaterialFromObject;
sphereObject.Attributes.MaterialIndex = index;
sphereObject.CommitChanges();
}