title: Change square to circle in Three.js PointCloud?
body: <p>I'm loading a .ply file using PLYLoader and rendering it using the PointCloud object in three.js.</p>
  
  <pre><code>var loader = new THREE.PLYLoader();
  loader.addEventListener('load', function (event) {
      var geometry = event.content;
      var material = new THREE.PointCloudMaterial({ vertexColors: true, size: 0.01 });
      var mesh = new THREE.PointCloud(geometry, material);
      scene.add(mesh);
  });
  loader.load(file_url);
  </code></pre>
  
  <p>It's working okay, the points are rendered correctly. However the points are rendered as a square. Is it possible to change them to a circle? If so, how?</p>
  
  <p>I found <a href="https://stackoverflow.com/questions/12372834/rendering-spheres-or-points-in-a-particle-system/27580073#27580073">this</a> old thread that shows the picture of a three.js sample. We can clearly see the circles. However <a href="http://threejs.org/examples/#webgl_particles_random" rel="noreferrer">that</a> same sample today shows squares (after they changed the ParticleSystem to PointCloud).</p>
  
  <p>Thank you</p>