title: Cant remove objects using Three.JS
body: <p>I'm using Three.JS to make a plane and put some boxes over it
  I need remove all boxes sometimes. So I'm trying to do it with the following code:</p>
  
  <pre><code>for ( i = 0; i &lt; scene.children.length; i ++ ) {
      var object = scene.children[ i ];
      if ( object != plane &amp;&amp; object != camera) {
          scene.remove(object);
      }
  }
  </code></pre>
  
  <p>/<em>This kill each object that is not the plane or the camera ;-)</em>/</p>
  
  <p>It deletes some boxes, but not all of them =(
  How can I delete all boxes?
  Greetings, José</p>