Quote Originally Posted by Azelor View Post
You could add a texture or use the unsharp mask filter.
I couldn't see the forest for the trees Thanks Azelor for the hint.
Here is an updated version. I generated a bigger texture with the VP Planet Generator and overworked it in gimp (sharpened, bumpmapped and coloured). I also found this little trick by K1TesseraEna for mapping objects to sphere with less distortion, and it worked wonders. Finally i redid the grid and the labels, so here we go:

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