title: Three js Add plane to the scene
body: <p>I am trying to add  a plane to the scene but if I check children's scene nothing is added. </p>
  
  <pre><code>var plane = new THREE.Mesh( new THREE.PlaneGeometry( 2000, 2000, 8, 8 ), new THREE.MeshBasicMaterial( { color: 0xffff00, opacity: 0.25 } ) );
  plane.visible = true;
  this.scene.add( plane );
  </code></pre>