title: Three.js - Double sided plane one side reversed
body: <p>I used the method of pushing faces to geometry to achieve double sided plane.</p>
  
  <pre><code>for (var i=0, len=geometry.faces.length; i&lt;len; i++) {
      var face = geometry.faces[i].clone();
      face.materialIndex = 1;
      geometry.faces.push(face);
      geometry.faceVertexUvs[0].push(geometry.faceVertexUvs[0][i].slice(0));
  }
  </code></pre>
  
  <p>but one side is reversed here is a fiddle <a href="http://jsfiddle.net/bN8ZH/" rel="nofollow">http://jsfiddle.net/bN8ZH/</a></p>