Threejs применяет отсечение к определенной области объекта

var renderer, scene, camera, controls, stats;

var cube,
  pass1ClipPlanes,
  pass2ClipPlanes;

var WIDTH = window.innerWidth,
  HEIGHT = window.innerHeight,
  FOV = 35,
  NEAR = 1,
  FAR = 1000;

function init() {
  document.body.style.backgroundColor = "slateGray";

  renderer = new THREE.WebGLRenderer({
    antialias: true,
    alpha: true
  });
  renderer.localClippingEnabled = true;
  renderer.autoClear = false;

  document.body.appendChild(renderer.domElement);
  document.body.style.overflow = "hidden";
  document.body.style.margin = "0";
  document.body.style.padding = "0";

  scene = new THREE.Scene();

  camera = new THREE.PerspectiveCamera(FOV, WIDTH / HEIGHT, NEAR, FAR);
  camera.position.z = 50;
  scene.add(camera);

  controls = new THREE.TrackballControls(camera, renderer.domElement);
  controls.dynamicDampingFactor = 0.5;
  controls.rotateSpeed = 3;

  var light = new THREE.PointLight(0xffffff, 1, Infinity);
  camera.add(light);

  stats = new Stats();
  stats.domElement.style.position = 'absolute';
  stats.domElement.style.top = '0';
  document.body.appendChild(stats.domElement);

  resize();
  window.onresize = resize;

  // POPULATE EXAMPLE
  var plane1 = new THREE.Plane(new THREE.Vector3(0, -1, 0), 0),
    plane2 = new THREE.Plane(new THREE.Vector3(0, 1, 0), 0),
    plane3 = new THREE.Plane(new THREE.Vector3(-1, 0, 0), 0);
  pass1ClipPlanes = [plane1];
  pass2ClipPlanes = [plane2, plane3];

  var cubeGeo = new THREE.BoxBufferGeometry(10, 10, 10),
    cubeMat = new THREE.MeshPhongMaterial({
      color: "red",
      side: THREE.DoubleSide
    });
  cube = new THREE.Mesh(cubeGeo, cubeMat);
  scene.add(cube);

  animate();
}

function resize() {
  WIDTH = window.innerWidth;
  HEIGHT = window.innerHeight;
  if (renderer && camera && controls) {
    renderer.setSize(WIDTH, HEIGHT);
    camera.aspect = WIDTH / HEIGHT;
    camera.updateProjectionMatrix();
    controls.handleResize();
  }
}

function render() {
  renderer.clear();
  cube.material.clippingPlanes = pass1ClipPlanes;
  renderer.render(scene, camera);
  cube.material.clippingPlanes = pass2ClipPlanes;
  renderer.render(scene, camera);
}

function animate() {
  requestAnimationFrame(animate);
  render();
  controls.update();
  stats.update();
}

function threeReady() {
  init();
}

(function() {
  function addScript(url, callback) {
    callback = callback || function() {};
    var script = document.createElement("script");
    script.addEventListener("load", callback);
    script.setAttribute("src", url);
    document.head.appendChild(script);
  }

  addScript("https://threejs.org/build/three.js", function() {
    addScript("https://threejs.org/examples/js/controls/TrackballControls.js", function() {
      addScript("https://threejs.org/examples/js/libs/stats.min.js", function() {
        threeReady();
      })
    })
  })
})();