"Richard Smith" <rms### [at] penet> wrote in message
news:web.40bb5389f72d05f9a14125e90@news.povray.org...
>
> Your Blue Mars effort inspired me.  I had been wanting to create a
spherical
> height field for analyses that I was doing on Mars' surface features.  I
> created an isosurface based on a Mars topo map as pigment.  The attached
> image is the result so far (without the ocean sphere).  I can't seem to
get
> a complete map of the surface in spherical form.  Weird.  Is your map
> complete?

Seeing as you haven't gotten a reply here yet, looks like the median pigment
value is at the threshold. Meaning, maybe you could change 'threshold' to
something other than 0 (greater than) and get the rest to show up. Either
that or a max_gradient being too low, but that usually doesn't appear so
clean in my experiences.

So if this was done by adding the function to a sphere the black parts are
probably ending up less than zero and so below the container sphere's
surface, if I'm thinking of all this correctly. I might be way off.

To Timothy Cook:  Wow! That's a beautiful view from space!

Bob H.

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