new ThreejsLayer(options, completeCallback);

new ThreejsLayer({ map: map }, function(layer){
  
  var geometry = new THREE.Geometry(),
    location = new google.maps.LatLng(lat, lng),
    vertex = layer.fromLatLngToVertex(location);

  geometry.vertices.push( vertex );

  var particles = new THREE.ParticleSystem(geometry, material);
  layer.add(particles);
});