Hi Peter. Hmmmm, well I can't readily explain it without really delving into
Bend.inc I guess but I do have what seems to be the answer anyhow:

#declare theshape = difference{
 object{ bent_object
   inverse
   }
 object{ torus1
   inverse
   }
 inverse
}

Not exactly logical, is that...? :-)
--
Farewell,
Bob

"Peter" <nos### [at] yahooconz> wrote in message
news:3da66bea@news.povray.org...
>
> Aim: to get a curved row of square holes in a ring.
> I thought I'd use a torus for the ring, some boxes for the holes and
> difference to punch the holes in the ring.

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