   ??What is a 3D Portal Engine??
  I''ve read some articles in that the word 3D Portal Engine falls.So I''m asking mysekf what that is? An Engine Plan? Or an Engine that renders Portals??  
  Basically it's a way to determine visible parts of the level geometry to cut down the overhead of rendering non-visible parts.(very simply said)Read this article on Filpcode, and things will get more clear.Certainly you can find more information googling the net.    Click NOW![edited by - SwSh on January 2, 2003 7:12:53 AM]