I did a similar image of Mars a year or so back, but rather than creat a 
mesh, I used the image to create a pigment function and from that an 
isosurface. Effectively I created a spherical heightfield. It renders quite 
fast and doesn't use that much memory. It also has the added benefit that I 
can exagerate the relief in code without rebuilding the mesh.

Rarius

"geep999" <nomail@nomail> wrote in message 
news:web.4bd58963692fcaae380f8080@news.povray.org...
> False colour image (lowest altitudes violet, rainbowing through red to 
> white
> highest) of the back of the Moon created from data from the Japan 
> Aerospace
> Exploration Agency Laser Altimeter on the KAGUYA (SELENE) Mission
> http://www.selene.jaxa.jp/index_e.htm.
>
> There is a such a large amount of data that the image (a triangular mesh) 
> was
> rendered as overlapping strips which were stitched together with 
> ImageMagick.
>
> The more familiar, but less colourful, front of the moon is here:
> http://pgg999.co.uk/moon/
>
> Cheers,
> Peter
>

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