title: THREE.EffectComposer is not a constructor
body: <p>first time here :) Hello everyone !</p>
  
  <p>I was trying to follow some code to create a volumetric light scattering shader using THREE, trying to reproduce this: <a href="https://codepen.io/abberg/pen/pbWkjg" rel="nofollow noreferrer">https://codepen.io/abberg/pen/pbWkjg</a></p>
  
  <p>But when I do it, I get a console error saying: 'THREE.EffectComposer is not a constructor'</p>
  
  <p>The issue is that I'm trying to reproduce this in ES6 environnement, using gulp. In order to prevent too much compiling time, I removed THREE from the gulp watch compilation for the duration of the dev, and imported it directly in index.html as follow:</p>
  
  <pre><code>&lt;script type="text/javascript" src="node_modules/three/build/three.min.js"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>I use THREE 0.88.0</p>
  
  <p>Did I miss a plugin ? Search on google didn't lead me to any recent answer about this issue.</p>
  
  <p>Thanks in advance for your answer !</p>