*UPDATE * The MEL script has been updated to a new renderSpeedy version 2.0 with lots of new features
http://www.artbycrunk.com/script/maya/scripts-wireframe-render-speedy/

the old version can still be found here..
http://www.artbycrunk.com/script/maya/scripts-crtoonwireframeren/

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INTRODUCTION :

Well my major problem was with maya 2008 64bit doesnt suport vector rendering plugins. so i thought i would  try something new.. i mean there has to be another sollution out there.. hunted the net for sometime.. and came across this Highend Wireframe Tutorial, but in the modelling stage the model would not have UVs so this is not an efficient enough method, so after fidling around with the toon shader i got it.

STEPS :

Step 1.
Selct all ur objects and apply a toon shader outline.
 

Step 2.
In the PFXToonShape Turn ProfileLines - Off, Border Lines - Off and Crease Lines - On.

Step 3.
In the Crease Lines tab, Hard Creases Only - Off and Crease Min/Max Value to 0.

Step 4.
Adjust the Crease Line Width depending on how far or near ur model is to the camera.

Step 5.
Render Using Maya Software.

The renders are very low cost, and dont require any uv information, and if u smooth the mesh, the toon shader will automatically update itself with the new mesh topology.

And here is some stuff that i rendered in the same technique.
This is a truck from the SWAT KATS series that i had made around Oct-Nov 2007.

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MEL SCRIPT UPDATED to VER 2.0