title: Unity3d; Skybox on mesh like in Source engine.
body: <p>In older games Ive made levels in, like unreal or half-life the skybox is a parallaxed texture that you assign to world geometry, for instance, the ceiling of your room, to give the illusion of the room being open to the sky.<br>
  There are some neat tricks or weird things you can achieve with this 'sky portal' method. For example you could have 'sky' in an underground room. or walk through a hole in the sky.</p>
  
  <p>I'm wondering is it possible to make a mesh in unity3d render as part of the skybox like in these older engines.</p>