title: Viewer started to display odd quality
body: <p>I would like to copy the viewer settings similar to which that are used in the translated files (View results) coming from <code>models.autodesk.io</code></p>
  
  <p>It seems to me that there has been a recent change in the API, as my settings no longer displays the way it used to. Now it shows a very grainy almost graphite like result:</p>
  
  <p><a href="https://i.stack.imgur.com/v5WXB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/v5WXB.png" alt="enter image description here"></a></p>
  
  <p>These are my settings:</p>
  
  <pre><code>viewer.disableHighlight(true);                          viewer.addEventListener(Autodesk.Viewing.SELECTION_CHANGED_EVENT, onSelectionChanged);
  viewer.setLightPreset(2);
  viewer.setEnvMapBackground(false);
  viewer.setQualityLevel(true, true);
  viewer.setGroundShadow(false);
  viewer.setGroundReflection(false);
  viewer.setProgressiveRendering(true);
  viewer.setDisplayEdges(false);
  viewer.setOptimizeNavigation(true);
  </code></pre>
  
  <p>I have tried all sorts of combinations.
  Problem firt occours when I add the URN to my app. Showing it from the models.autodesk.io looks great and crisp. I would like to copy those settings if possible. Thanks.</p>