title: How to load ktx file with cubemap in three.js?
body: <p>I maked <code>ktx</code> file with <code>cubemap</code>. and it encode to <code>pvrtc</code>. then load to this file in <code>three.js</code>. and I could see this console warning.</p>
  <pre><code>number of faces expected1, but found 6
  </code></pre>
  <p>I can't see the material that this file is applied to.</p>
  <p>I'm using <code>three.js</code> version <code>0.107.0</code></p>
  <p>How can I use this <code>ktx</code> file?</p>