title: How to load tiles onto a SCNSphere?
body: <p>I want to dynamically load tiles and display them on a <code>SCNSphere</code>. Of course I can assign a <code>UIImage</code> to the <code>SCNMaterial</code>:</p>
  
  <pre><code>sphere.firstMaterial!.diffuse.contents = image  
  </code></pre>
  
  <p>However that means that I've to merge all tiles together in a huge <code>UIImage</code> first. And I have to do that each time a new tile is fetched. A <code>CATiledLayer</code> based <code>SCNMaterial</code> would be another option but sadly it's not available on Apple Watch.</p>
  
  <p>Is there a way to keep the tiles separate in SceneKit? I tried using multiple materials for the sphere but that didn't work.</p>