docs: function ReticleRenderer(camera) {
    this.camera = camera;
  
    this.reticle = this.createReticle_();
    // In front of the hotspot itself, which is at r=0.99.
    this.reticle.position.z = -0.97;
    camera.add(this.reticle);
  
    this.setVisibility(false);
  }