"kurtz le pirate" <kur### [at] yahoofr> wrote in message 
news:kurtzlepirate-E03CC5.19241216112005@news.povray.org...
> In article <43798cb2$1@news.povray.org>, "Slime" <fak### [at] emailaddress>
> wrote:
>
> ::> any size you like but image must have width = 2 x height.
> ::
> ::No; regardless of an image's size, it will be treated the same way by
> ::POV-Ray. This means it will be squeezed into the unit square from 
> <0,0,0> to
> ::<1,1,0>, even if doing so changes its proportions. (If spherical mapping 
> is
> ::used, the image will similarly wrap all the way around the sphere no 
> matter
> ::what its width or height is.) It's up to the user to resize the image as
> ::necessary.
> ::
> :: - Slime
> :: [ http://www.slimeland.com/ ]
>
> ok just look at this samples :
>
> the difference between the two images is only the ratio of the source
> image map.
>
> when ratio is 1/2, circle is render as a cercle.
> when ratio is 1/1, circle is render as an ellipse.
>
> ... snip ...
>

I wouldn't want to get in the way of a good argument, but I suspect that the 
two images you started with (image01.png & image02.png) were different in 
another respect.
My guess is that the second image had a fair bit less green stripe that the 
first one had, and that the circle containing the number 14 was the same 
shape in both source images.
If you use a graphics editor to scale the first image non-uniformly by one 
half in the horizontal direction without changing the height, you should 
find that, even though the proportions will now be 1/1, the rendered image 
should still wrap correctly around the sphere.
The reason a 1/2 ratio makes a circle on the centre line of your source 
image map perfectly to a circle on the sphere of your output image is that 
the source image is wrapped around the circumference of the sphere 
horizontally and around half the circumference of the sphere vertically.

Regards,
Chris B.

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