Geometry built with GDML file: Mother volume not visualized

Hi everyone,

I’m trying to build a geometry using a GDML file.

I defined 2 volumes (2 boxes): see
Example1.txt (1.8 KB)

As you can see, the 2 volumes “glass” and “vessel” and not parent related.
I have the geometry visualization as expected:
(in red the vessel, in pink the glass)

Now, I’m trying to define the vessel volume as the mother of the glass volume.
So I modify my geometry as follow:
Example2.txt (1.8 KB)

Now I have this visualization:

So you can see that the parent volume vessel “disappears” from the visualization.

Am I missing something here?

Thanks a lot

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