Am 19.06.2016 um 07:32 schrieb hkarsten:

> regarding to this peace of information, I took from the PovRay-help-file (V 3.6)
> 
>     smooth_triangle
>     {
>         <Corner_1>, <Normal_1>,
>         <Corner_2>, <Normal_2>,
>         <Corner_3>, <Normal_3>
>         [uv_vectors <uv_Corner_1>, <uv_Corner_2>, <uv_Corner_3>]
>         [MESH_TEXTURE]
>     }
> 
> This one is stil not working

The piece of information above is from the documentation of the `mesh`
primitive, /not/ the stand-alone `smooth_thriangle` primitive.

> Does anybody know, how to use uv in smooth_triangle?

Technically speaking you can't; `smooth_triangle` does not support UV
mapping.

Practically speaking, all you need to do is wrap the `smooth_triangle`
in a `mesh` block.

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