Am 07.11.2011 11:49, schrieb Adrian:
> I have an image [1] of a spherical surface that I want to map onto a sphere, but
> it is a Mollweide projection. I tried to convert it to a rectangular Mercator
> projection (is that even the right one?) with Mathematica [2], but it doesn't
> really work. I do get a rectangular image which kind of looks right, but when I
> use the texture in Povray with
>
> pigment { image_map { png "text.png" map_type 1 } }
>
> the edges don't seem to match up and the texture looks distorted around the
> poles. In the end, I want to create something similar to this [3]. What can I
> do?

You want to convert the image to an "equirectangular projection" (see 
http://en.wikipedia.org/wiki/Equirectangular_projection); that'll allow 
you to use map type 1.

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