FYI and not knowing if it can be useful or not, here is an example of Gmsh hex mesh.
Everything has to be created within GMSH (points, lines, surfaces, ...).
There is a tutorial on the Gmsh site as well.
Thanks for sharing. It's a pity. The mesh is made manually. I'm searching for a way to make a hex mesh by the use of GMSH meshing algorithm and some recombine or similar command. Best would be an example with the geometry imported by brep but this is not necessary.
Why not? Though I do not know the internal structure of Freecad which may be an issue to go into th details.
What you would like is to be able to mesh with Hex while still providing a BREP (is it the name?) CAD description. Of course the geometry whould have to be subdivided and the information of the number of element (or size) should be provided. Is it correct?