Using ARkit with UE5.03, facial expression live link works, but neck doesn't move

Development Character & Animation
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1

Hi, I am trying to test metahuman with Apple ARKit live link. I successfully downloaded and exported Metahuman I made in MHC and enable all plugins needed, and check all Live Link details in Metahuman BP details panel.

I checked the facial expressions are successfully synced with mine, but its neck doesn’t move at all. I read official Unreal documents but have not figured out what happens. (additionally, in official documents, there is ‘Details → LLink Face Subject’ property, but in my details panel there are ‘Live Link → ARkit Face Subj and Live Link Body subj. Does new version of UE 5.03 has different properties?’

Thanks for reading, and please let me know if you know why it happens and how to solve it, or just having the same issues.

2

Problem resolved. It was a quite simple solution.

  1. click Face_AnimBP. Find LLink Face Subj variable. Find Default property on detail panel, and switch your IOS device connected.
  2. Enable ‘stream head rotation’ in a setting of Live Link Face app.

Thanks you anyway, and I hope it would be helpful for someone.

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