6 The Persistence of Vision Raytracer, or POV-Ray, is a ray tracing program.

     6 The Persistence of Vision Raytracer, or POV-Ray, is a ray tracing program.

     7 

     7 

     8   http://www.povray.org/

     8   http://www.povray.org/

     9                 home page

     9                 home page

    10   http://en.wikipedia.org/wiki/POV-Ray

    10   http://en.wikipedia.org/wiki/POV-Ray

    11   http://xahlee.org/3d/povray.html

    12   http://xahlee.org/3d/povray.html

    12   http://xahlee.org/3d/povray_emacs.html

    14   http://xahlee.org/3d/povray_emacs.html

    13 

    16