On 08/05/2015 12:21, Thomas de Groot wrote:
> I am sorry to disappoint you ;-)
>

You don't.

>>

>
> Yes that is my understanding too, up to a point. What mystifies me is
> when an object is patterned with slope and then rotated: why is the
> pattern not following the rotation of the object? That is not correct to
> my understanding.

It might have helped if I actually rotated the object.
Puzzling.
Try this instead.

     object {
         ...


         rotate N*y
         pigment { Tufte }

         }

It is hard to see on the SuperEllipsoid I was using.

-- 

Regards
     Stephen

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