@Blake
I did a new test on my laptop with the "Fake" Orbiter folder. If the Orbiter folder is in the root directory, the textures are entered correctly in the mesh file, i.e. including sub-folders. At another location e.g. "C: \Test\Orbiter" only the texture names are entered without the sub-folders. It would be helpful if the Orbiter folder didn't have to be in the hard drive's root path. To do this, you would have to edit your add-on again.
@Matias Saibene
I'm assuming that you got Orbiter working on Linux.
I saw gattispilot mesh. It's not correct either. You use a subfolder "Citroen3CV" in the Orbiter Textures folder. This means that the mesh must end up as follows
TEXTURES 3
Citroen3CV\GreenPaint.dds
Citroen3CV\Headlights.dds
Citroen3CV\Ventilation.dds
but it says
TEXTURES 3
GreenPaint.dds
Headlights.dds
Ventilation.dds
you can copy the textures in the Orbiter\Textures folder there they should be found. But you should use a subfolder for your mesh because sooner or later there will be a chaos of textures in the main Orbiter Textures folder.
The problem with you should be that the folder structure under Linux is different than under Windows. e.g. When exporting mesh, the Orbiter folder must be in the main directory of the hard drive, as I wrote above for my new test.
In addition, there is another problem between Windows and Linux that in Linux e.g. "orbiter" and "Orbiter" or "oRbiTeR" are different folders while in Windows they are all the same. And the directory separators are also different. In Windows "\" and in Linux "/"
You could test the Windows version of Blender with Wine and export your mesh from there directly to your "C:\Orbiter\Meshes" folder. Your Orbiter folder must be in the C: \ main directory. Then copy your textures in your Wine "Windows" "C:\Orbiter\Textures\Citroen3CV" folder.
So take the following steps.
1. Start the Windows version of Blender, install Blake's Blender Mesh Tools there.
2. Load your Citroen3CV.blend file, delete your materials with the 3 textures and create them again. Then load your textures into these materials from your C:\Orbiter\Textures\Citroen3CV folder.
3. Choose output path C:\Orbiter\Meshes and build your mesh.
I hope that works