title: Emit light from a geometry in Three.js
body: <p>Is it possible to have a custom geometry emit light in Three.js?</p>
  
  <p>There is a similar question from 5 years ago <a href="https://stackoverflow.com/questions/14997484/three-js-custom-light-geometry?rq=1">here</a>.</p>
  
  <p>In my particular case, I have created a TorusGeometry. I would like this torus to also give off light. Is that possible?</p>