text: //------------------------------------------------------------------------------------------------------------------
  // Create a mesh with grid
  //------------------------------------------------------------------------------------------------------------------
  
  new Mesh(viewer.scene, {
      geometry: new VBOGeometry(viewer.scene, buildGridGeometry({
          size: 1500,
          divisions: 150
      })),
      material: new PhongMaterial(viewer.scene, {
          color: [0.0, 0.0, 0.0],
          emissive: [0.4, 0.4, 0.4]
      }),
      position: [0, -5, 0],
      collidable: false
  });