title: three.js outer glow for sphere object?
body: <p>I'm building some sort of planetary system in <strong>three.js</strong> and I spent couple of hours looking for a decent solution to get an <strong>outer glow</strong> on one planet - a sphere object with a texture.</p>
  
  <p>I came across this example <a href="http://stemkoski.github.io/Three.js/Selective-Glow.html" rel="noreferrer">http://stemkoski.github.io/Three.js/Selective-Glow.html</a> which kind of does the trick, but the thing is - this form of glow also affects the main 3D object resulting in color change (as seen there).</p>
  
  <p>Another nice glow example can be found here <a href="http://bkcore.com/blog/3d/webgl-three-js-animated-selective-glow.html" rel="noreferrer">http://bkcore.com/blog/3d/webgl-three-js-animated-selective-glow.html</a> but again it glows the entire region, not only "outer" thing.</p>
  
  <p>I've been reading some discussion thread about "overrideMaterial" property on GitHub but this seems experimental, unused and undocumented... not even sure if this could solve my problem.</p>
  
  <p>Please share your ideas, thanks!</p>