> The #if clause is necessary because the last vector statement must not be 
> followed by a comma.

In most cases in POV-Ray, an extra comma is permitted at the end of a list.

If that isn't the case for meshes, you can still go with the simpler

         <(a+1)*800+b, (a+1)*800+b+1, a*800+b+1>
         #if  ( b != 798 | a != 398 )
           ,
         #end

which doesn' t look like there's some crazy weird special case.

 - Slime
 [ http://www.slimeland.com/ ]

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