In architecture it is very common that a project will be mirror reversed across an axis (north/south or east/west etc.). In most geometry software this is very easy to deal with. In Twinmotion I am perplexed. The correct answer is NOT reimport the building geometry and you are all set. All the landscape elements and any objects placed from Twinmotion (including camera locations) are now in the wrong place. See the enclosed pictures. Thanks.
original
Mirrored - I think this speaks for itself
Rear right original
Rear right mirrored - see furniture and missing rock walls etc.
Hello ,
Thank you for posting in the community and sorry to hear about the issues. I am not certain what is happening and we would need to investigate further your scene. Would you be able to submit a bug by following this link: https://twinmotionhelp.epicgames.com/s/case-community-page
Kind regards,
Vincent B.

Thanks Vincent,
I will submit a bug but I don't think this is a bug (by definition). I'm looking for a process or tool (that I could be missing). I have enclosed two images above to illustrate more. I can (and often do) mirror reverse the geometry in my 3D models). Typically they are late changes from the design team. I can mirror (flip) the geometry easily in the tools I use for creating the geometry (outside of Twinmotion). But, I also have many hours of work creating and landscape surfaces, boulder walls, plants, furniture, (the list goes on) inside of Twinmotion. At the moment I can't find a way to flip all those objects in Twinmotion to match the newly flipped geometry of the structure. Thanks.
Hello ,
Thank you for the follow-up message and further explanation on your issue. It does seem like a mirror or flip function. Maybe making a suggestion on the road-map would help: https://portal.productboard.com/7pu88c9kpmqtzt8hwg6arujh/tabs/4-under-consideration
Kind regards,
Vincent B.