> Thanks for the answers, here is the link of my scene:
>
> https://www.dropbox.com/s/au2t9g5l7btmhqu/Block3D.png?dl=0
>
> As you can see, some faces are shared between two cubes.
> The whole block is defined by one "mesh2" object, in which I have defined
> several triangles to make a cube. The whole block is made of these cubes.
> The problem is, that I have a transparent block and I would like these inner
> faces do not appear. I have also tried to apply the "merge" function to my whole
> block but it didn't work.
>
> I'm looking forward to read you.
>
>
>

There is no way to make those interior faces disappear except by actualy 
removing them from the mesh.

A beter aproach would be to only define the actual faces, possibly using 
only 2 triangles per actual face, or use an "unit" box that you then 
scale to the desired dimention.

My prefered way would be to use the box primitive with the desired 
dimention.


Alain

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