Bill Hails <me### [at] billhailsnet> wrote:
> Probably this should go to p.newusers, but I can't seem
> to find anything in the manual.
>
> I'm doing a simple moon - sphere, uv_mapping, image_map and bump_map:
>
> #declare Luna = sphere {
>     0, 1
>     texture {
>         uv_mapping
>         pigment {
>             image_map {
>                 jpeg "albedo.simp750.jpeg"
>             }
>         }
>         normal {
>             bump_map {
>                 jpeg "moonbump4k.jpg"
>                 bump_size 1.8
>             }
>         }
>         finish {
>             ambient VeryDarkBlue
>             diffuse 1.0
>             specular 0.1
>             roughness 0.35
>         }
>     }
>     rotate -90 * y
> }
>
> but that just doesn't cut it because at the terminator
> the bump map just abruptly stops.
>
> So I want to replace the sphere with either a height_field
> (are spherical height fields possible? I can't find any
> references) or an isosurface, using the bump map file as data.
>
> I'm sure this question must have been asked a hundered
> times before, so please excuse me if I've missed it,
> but I can't seem to find anything relevant.
>
> --
> Bill Hails
> http://billhails.net/

There is a way to do a spherical height field, and its in the help file.
http://www.povray.org/documentation/view/3.6.1/468/

Enjoy,
Ian

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