bel into centimeters.
    const labelBaseScale = 0.01;
    label.scale.x = canvas.width  * labelBaseScale;
    label.scale.y = canvas.height * labelBaseScale;

    scene.add(root);
    return root;
  }

  makePerson(-3, 150, 32, 'Purple People Eater', 'purple');
  makePerson(-0, 150, 32, 'Green Machine', 'green');
  makePerson(+3, 150, 32, 'Red Menace', 'red');

  function resizeRendererToDisplaySize(renderer) {
    const canvas = renderer.domElement;
    const width = canvas.clientWidth;
    const height =