title: THREE.js GLTFLoader CORS error how to enable CORS?
body: <p>hello I am trying to load a GLTF model with the THREE.js GLTFLoader, I am getting a CORS error (not access-control-allowed-origin present..) 
  I am pulling from a s3 bucket other assets as well and everything works, except for the GLTF so my guess is I need to pass some CORS flag to the GLTFLoader. 
  right now: </p>
  
  <pre><code>    this.loader = new THREE.GLTFLoader();
      this.loader.load(avatar_path, gltf =&gt; {..})
  </code></pre>
  
  <p>Edit1: I already tried with: </p>
  
  <pre><code>   loader.setCrossOrigin( 'anonymous' ) 
  </code></pre>
  
  <p>and</p>
  
  <pre><code>   loader.setCrossOrigin( 'use-credentials' ) 
  </code></pre>
  
  <p>without success. always same CORS error. </p>