title: Transparent material with ThreeJS
body: <p>I have a mesh lambert material in threejs defined like this:</p>
  
  <pre><code>new three.MeshLambertMaterial({
      transparent: true,
      emissive: 0xffffff,
      map: texture,
      alphaTest: 0.1
  });
  </code></pre>
  
  <p>We decided to turn <code>alphaTest</code> to 0.1 since that seemed to be the only way to actually make the  material transparent. Otherwise the background color behind the material ends up being the clear color. The problem with the above technique is that we get an ugly grey line around the non-transparent portions. This texture represents text, which is even worse.</p>
  
  <p>Is there a better approach to make a transparent material that will just show the object behind it?</p>