Alain, thanks!
I assume that I understood about what you wrote
Not clearly here it:

Alain <kua### [at] videotronca> wrote:

> If a mesh object is surrounded by media, is totaly or partialy
> transparent AND you don't want any media inside, you need to use version
> 3.7 RC7 or later and add "inside_vector" followed by a direction vector.
> This also allow the mesh to be used in a difference or intersection by
> making it "solid".
> If a mesh have an inside_vector and need to contain some media, it need
> the "hollow" option.
>

"inside_vector" - What is it? It is necessary to develop normals in comparison
with RC6?
I would be very grateful to you for very small example of a code: mesh(not
mesh2!)-room with window, mirror floor with texture image and metallic, media
scattering and photons(pass_through).

I am inclined to pass from mesh2 to mesh. It will allow to apply a separate
material to each triangle. Probably, I didn't see how to do it with mesh2.

It very much would help me and Mr with acceleration of creation of the exporter
Blender to Povray.
Thank you!

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