An example .MDL for Moray, a 3D-modeller for POV-Ray and Polyray.
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Moray homepage:       http://www.stmuc.com
POV-Ray homepage:     http://www.povray.org
Author:               Stefan Onderka (Nop)
Author email:         Nop@gameart.com
Author homepage:      http://www.gameart.com/Nop
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The fog used for rendering was added to the .POV file by hand, so
be sure not to overwrite it when re-exporting the file from Moray
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Textures copyright VALVE Inc. You may use this model for your own
purposes as long as you mention my name somewhere.

...Yes, I know it's only a cardbord fake. But by adding the three
missing sides, you can practise a bit.                        
     
                                                              Nop