> Let me turn the question around.
>
> Can someone write a script which draws two triangles with a single
> texture projected on it; using provided UV co-ordinates?

   Just change the texture on your example by this one:

     texture{
       uv_mapping // <---- tells the texture to use UV coords
       pigment{
         image_map{
           jpeg "test.jpg"
         }
       }
       finish  {specular 1}
     }


> My attempt is clearly incorrect.  I tried copying line for line what
> I have seen in tutorials and it still doesn't work, so clearly I'm
> doing something wrong.

   Better have a look first at this page of the docs:

   http://www.povray.org/documentation/view/3.6.1/68/


> I can get it work if I load my Wavefront OBJ file into PoseRay and
> then export it.  However, PoseRay exports a whole lot of stuff;
> hundreds of lines of script.

   Try it first with a *small* mesh to see how it creates the POV-Ray mesh.

> Also, as long as I have people's attention.  Is there a good link to
> find set up scripts to texture and light terrains?  Scripts which do
> the marbling effect based on slope, and synthesize really rich
> looking ground textures?

   Look at the textures on my Tierra project (i_land.inc):

   http://www.ignorancia.org/en/index.php?page=Project_Tierra

   It uses isosurfaces, but the textures there should work the same on a
heightfield or a mesh.

   Regards,

-- 
Jaime Vives Piqueres
		
La Persistencia de la Ignorancia
http://www.ignorancia.org

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