title: Collada model faces not displaying correctly in three.js
body: <p>After importing a collada model into three.js, some of the model's faces are only visible from the inside of the model and not from the outside.</p>
  
  <p>How can I fix the problem with the faces in question?</p>
  
  <p>Is it possible to have the model's faces visible from both sides?</p>