Cannot export optimized poses

[sam598]

This pull was created so that optimized poses could be exported after training:

#1191

Unfortunately it only exports the centered and scaled poses, and was merged anyway.

There were attempts to fix this, but they were later broken by this update:

#2092

[Cerf-Volant425]

Hello, I'm also encountering the same issue, I was wondering whether you fix it now. And if possible, can we add the code to export optimised pose in #1191 to the version before #2092 ? Your insight will be really helpful for me, looking forward to your reply. Thanks in advance.