Hi, Suggest you talk to optitrack customer about wanting LiveLink. I was talking to them just before COVID hit and it sounded like they were considering adding LiveLink to their software. If they get requests from multiple customers it will probably help push them towards LiveLink support for Unreal.
Right now my office is closed and my optitrack setup is the one thing I wasn’t able to bring home with me, so I’ve not had a chance to work with it for months.