title: what are sparse voxel octrees?
body: <p>I have reading a lot about the potential use of sparse voxel octrees in future graphics engines.</p>
  
  <p>However I have been unable to find technical information on them.</p>
  
  <p>I understand what a voxel is, however I dont know what sparse voxel octrees are or how are they any more efficient than the polygonal techniques in use now.</p>
  
  <p>Could somebody explain or point me to an explanation for this?</p>