Wasn't it Leslie who wrote:

>My problem is trying to put the image of the dog on the uneven suface of the
>weeble. The weeble has a face in the middle and on either side are the ears
>with a tail at the back so the PNG image is being wrapped using the
>cylinder mapping.
>
>The face appears ok but the top and bottom of the ears are skewed backwards.
>
>I assume this is because the very top and bottom are curved inwards and
>POVRay is adjusting the image to fit.

I don't think POVRay is doing any such adjustment. It doesn't do any
adjustment for ellipsoids, so I can't imagine it doing so for eggs.

If you make a temporary copy of your image with some vertical lines
drawn through the ears, you should find that the lines remain perfectly
vertical under a cylindrical map.

Do you get the same "skewed ears" effect if you try mapping your image
onto a plain cylinder or sphere?

Are you certain that the axis of the Weeble goes through the origin? A
cylindrical image map radiates from the y axis.

-- 
Mike Williams
Gentleman of Leisure

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