[BUG] Severe skeletal deformation / Body animations not working in UE 5.8 with CC5 characters

Hello everyone,

I am experiencing a critical issue with Character Creator 5 characters in Unreal Engine 5.8. The body skeleton completely fails to accept or process any third-party/external animations.

Below I have attached a YT video demonstrating the issue (the video also covers Cascadeur Live Link synchronization failure).

Symptoms / The Bug: When applying any external animation to a CC5 character in UE 5.8, the skeleton breaks completely:

  • Bones become severely twisted and contorted.
  • Limbs detach or fly off to the sides.
  • The character mesh remains entirely static and doesn’t move, except for a single finger.

What DOES work:

  • Facial Animation: Works perfectly as before (e.g., using the MetaHuman video-to-animation pipeline).
  • CC5 HD Body Rig: Functions correctly, and the bones rotate properly within the rig itself.

The core issue is strictly tied to the body skeleton failing to retarget or play third-party animations.

Troubleshooting Steps Taken: I have spent a lot of time trying to isolate the problem:

  1. Tested multiple versions of Character Creator, Unreal Engine, and the Auto Setup plugin (see environment details below).
  2. I even used the “Migrate” function to transfer perfectly working CC5 characters from an older UE 5.6 project directly into a UE 5.8 project. Unfortunately, the exact same deformation issue persists in 5.8.

My Environment & Setup:

  • Tested CC versions: CC 5.07 and CC 5.12
  • Used plugins / setups:
    • Auto Setup 1.41 for Unreal 5.6
    • Auto Setup 2.01 for Unreal 5.6 (All-in-One)
    • Auto Setup 2.03 for Unreal 5.6 (All-in-One)
    • Auto Setup 2.03 for Unreal 5.8 (All-in-One)
  • Versions of UE involved:
    • UE 5.6.1 — Working great (same setup/pipeline works perfectly here).
    • UE 5.8.1 — Not working.
    • UE 5.8.2 — Not working.

Current specific setup where the video was recorded: UE 5.8.2; character from CC 5.12; Auto Setup 2.03 for Unreal 5.8 (All-in-One). Result: Complete failure when trying to use any animations (except animations imported directly from CC5).

Has anyone else encountered this complete skeletal break in 5.8, or is there a known workaround for the new UE version? Any help would be greatly appreciated.

VIDEO:

I really hope someone knows what kind of issue is this. I spent another few days trying to solve this - no success

Hi zidlont,

We tried to replicate the issue on our end but were unable to reproduce it. Could you confirm whether the animation was originally created for or applied from a different character?

Please send your working file to winnerhung@reallusion.com, or share a download link so we can investigate further.

CC5.13

IC8.75

Thank you.