title: How can we use a equirectangular image for WebXR using three.js?
body: <p>I am creating a web app using Three.js in which I have to use equirectangular images for Pano tours. I want to add a feature to switch between normal mode to VR mode as React360 and AFrame does. I don't want to use React360 and AFrame as my application is already using Three.js.</p>
  <p>I checked the three.js example but none of the examples is using the equirectangular image for VR. Is there a way to convert equirectangular image to CubeMap, So, that I can use it to switch between normal and VR Mode?</p>