https://bugs.documentfoundation.org/show_bug.cgi?id=134141
--- Comment #7 from Regina Henschel <[email protected]> ---
It is a large task. Therefore I have set it to "enhancement". 3D models in MS
Office consists of two parts:
One part is the view settings in <am3d:model3d> in slide#.xml. That is easy.
The other part is the model itself in folder media. MS Office uses glTF.
https://en.wikipedia.org/wiki/GlTF
That is the hard part. I don't know, whether a library with a license exists,
which LibreOffice can use directly.
A start would be, to make glTF-models corresponding to our preset 3D-objects
using a third party tool and use these for export. MS Office has no means to
change the 3D model itself, but only for changing the view. So the model would
likely be the same on import.
Another thing, which should be done anyway, is to provide a fallback picture as
MS Office has it in its <mc:Fallback> element. AFAIK you need at least MS
Office 2019 to show 3D Models.
I don't know, whether PowerPoint keeps something in the media folder, which is
not actually used. If it keeps it, you could put an xml-fragment of our
3d-scene there and recover it on import.
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