public override XmlElement Save(XmlDocument xmlDoc)
{
XmlElement xmlNode = base.Save(xmlDoc);
xmlNode.SetAttribute("Global", global.ToString());
xmlNode.SetAttribute("CastShadows", castShadows.ToString());
xmlNode.SetAttribute("AmbientLightColor", ambientLightColor.ToString());
xmlNode.AppendChild(lightSource.Save(xmlDoc));
return(xmlNode);
}