yer. This sample demonstrates a work-around to implement hit test
        on layers by placing transparent placeholders for each quad layer
        in the projection layer.

        Try using the trigger on either controller to select one quad layer,
        and an arrow will indicate the selection.
        <a class="back" href="./index.html">Back</a>
      </p>
    </details>
  </header>
  <main style='text-align: center;'>
    <p>Click 'Enter VR' to see content</p>
  </main>
  <script type="module">
    i