title: Three.js: incorrect light on Three.Geometry + LambertMaterial meshes
body: <p>I have improved my previous formulation of this question (<a href="https://gamedev.stackexchange.com/questions/93031/three-js-lighting-not-calculating-correctly-on-three-geometry-objects">previous question version</a>) with a jsfiddle that uses the most recent build of Three.JS and deomonstrates my Three.Geometry lighting issue.  I couldn't get the dependencies to work in Stack Snippets, but the JSFiddle works:</p>
  
  <p><a href="http://jsfiddle.net/DavidWaughRRRRRRRR/hoadj57w/4/embedded/result/" rel="nofollow noreferrer">JSFIDDLE SHOWING INCORRECT LIGHTING</a></p>
  
  <p><img src="https://i.stack.imgur.com/L69KD.png" alt="JSFiddle"></p>
  
  <p>Notice the incorreectly lit faces on the left (Three.Geometry objects), versus the correctly lit adjoining faces on the right (Three.CubeGeometry).</p>
  
  <p>My light code:</p>
  
  <pre><code>hemiLight = new THREE.HemisphereLight( 0xffffff, 0xffffff, 0.6 );
  hemiLight.color.setHSL( 0.6, 1, 0.6 );
  hemiLight.groundColor.setHSL( 0.095, 1, 0.75 );
  hemiLight.position.set( 0, 50, 0 );
  app.scene.add( hemiLight );
  
  dirLight = new THREE.DirectionalLight( 0xffffff, 1 );
  dirLight.color.setHSL( 0.1, 1, 0.95 );
  dirLight.position.set( -1, 1.75, 1 );
  dirLight.position.multiplyScalar( 50 );
  app.scene.add( dirLight );
  </code></pre>
  
  <p>You can see the JSFiddle source for the THREE.CubeGeometry (mesh 1, 2, 3) and THREE.Geometry (mesh 4, 5, 6) objects.  Mesh 5 and 6 have lambert faces individually instantiated and assigned by array, whereas geo 4 has a single lambert material passed in to the mesh constructor.</p>
  
  <p>Is it possible that the materials in the material-array storage class THREE.MeshFaceMaterial need to be in a particular order for a cube to light properly?  I've assigned them in the order: 2 bottom faces, 8 side faces, 2 top faces.</p>
  
  <p>Why would the light be tiling on the green cubes if the Three.Geometry object appears to be correctly added to the scene?  Thanks.</p>