Alain <ele### [at] netscapenet> wrote:
> povray nous apporta ses lumieres en ce 2005-04-30 15:33:
> > Alain <ele### [at] netscapenet> wrote:
> >
> >>povray nous apporta ses lumieres en ce 2005-04-30 10:56:
> >>
> >>>Is there an easy way to texture a large (4 million+ triangle) mesh2 object
> >>>from an image file?  I'm trying to do some hi-res mars renders from
> >>>elevation data.  I can build the model, but I haven't thought of an easy to
> >>>to get the right colors onto it.  I have a .png mars texture, but it
> >>>doesn't want to play nice with the mesh2.  If someone could point me to an
> >>>example it would be much apreciated.
> >>>
> >>>
> >>
> >>As your mesh2 is realy only a hight field, and your image probably a top-down view
of the same area.
> >>Can you simply the image_map as on a plane? Rotate your mesh to match the plane of
the image_map,
> >>translate the image so that both origins match.
> >>
> >>Alain
> >
> >
> I tough that it was only a section that could be assimilated to a bumpy plane. My
bad assumption.
> > actually, it's not a height field, it a mesh2 that is created using data for
> > the whole planet, it's basically a bumpy sphere... but I think I've thought
> > of a way to texture it... It's not gonna be nice, but it'll work.
> >
> >
> OK! Then use a warp{... spherical } to map your image onto the spherical mesh. You
can adjust the
> positioning using rotation. Read the documentation section: 3.5.12.6.5  Mapping
using warps
>
>
> Alain

image_map with a map_type 1 works.  I didn't think to try that before for
some reason. Thanks for poiting me in the right direction.

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