In article <437b80f7@news.povray.org>,
 "Chris B" <c_b### [at] btconnectcomnospam> wrote:

::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.

sorry, here is the 2 images maps. note that in this images, circle for 
the number is a circle. image02 is not just scaled from image01.
so, if a leave a 1/1 ratio, i must draw an ellipse !

for me, image_width is wrapped along the 360 degres and the imahe_height 
is warpped from -90 to +90 degrees -> 180... and 180/360 give 1/2 ratio.

where i'm wrong ?

regards,
klp

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