title: Faces missing after import
body: <p>I have created this T-block by extracting a plane in Blender:</p>
  
  <p><img src="https://i.stack.imgur.com/G6tTL.png" alt="Blender"></p>
  
  <p>After that, I exported it using the <a href="https://github.com/mrdoob/three.js/tree/master/utils/exporters/blender" rel="nofollow noreferrer">official Three.js Blender Exporter</a> and imported it with the code below. But unfortunately, the faces are missing. I have read that it might be necessary to use <code>THREE.GeometryUtils.triangulateQuads()</code> but that didn't help. Any idea?</p>
  
  <p><img src="https://i.stack.imgur.com/cIaW7.png" alt="Three.js"></p>
  
  <pre><code>loader.load "/scripts/blocks/T.js", (geometry, materials) =&gt;
      THREE.GeometryUtils.triangulateQuads geometry
  
      mesh = new THREE.Mesh(
          geometry
          materials[0]
      )
  
      mesh.position.y = 500
      mesh.scale.set 50, 50, 50
  
      @get("scene").add mesh
  
      @render()
  </code></pre>
  
  <p>My blender is <a href="http://nordformat.ch/T.js" rel="nofollow noreferrer">here</a>.</p>