Votes
0
Product:
Character Creator 4
Version:
4.53
Status:
Assigned
Issue 11965
Angle Discrepancy Occurring During FBX Import via the CC4-UE Plugin
This issue was previously reported via support ticket [Ticket ID: 260398].

We have already reviewed and followed the steps shown in the video provided in your response (https://courses.reallusion.com/home/character-creator/pipelines-and-render/unreal?v=updated-workflow-for-unreal-engine-5-5-auto-setup-|-character-creator-4-tutorial). However, the rotation offset issue (particularly on the head and cc_facialbone) still persists after following the procedure exactly.

We are using the following versions:
Unreal Engine 5.5.2
Character Creator 4.52
iClone 8.52
Auto Setup 1.38

Steps to reproduce and screenshots are available from our initial ticket. Please advise on the next steps or if any configuration or plugin version mismatch could cause this.

Thank you.
OS: Windows 11
  •  4
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BugCharacterAnimationOnline Manual
Submitted byyoichi.nakai
1
COMMENTS (4)
yoichi.nakai 
Dear JoePan,

Thank you for your response.

I apologize for not noticing earlier that access to the file was restricted.
I’ve now updated the sharing settings, so you should be able to access the file without any issues.
Could you please check again and let me know if it works on your side?

Thank you again for your support, and sorry for the inconvenience.

Best regards,
Yoichi
Feedback Tracker Admin 
Hi yoichi.nakai，

Thanks for your Feedback,

Since I need to view the contents of the file in the link, could you help me enable access permissions on Google Drive?

JoePan
Reallusion
yoichi.nakai 
We used the default CC4 project “Talking Kevin.ccProject” to verify the animation offset.
The animation used for testing is the one named “Full Body”, which is included by default in CC4.
Steps:
    1. Exported both the mesh and animation from CC4 in FBX format.
    2. Following the plugin instructions, imported the data into UE5 using the CC plugin and placed it in the CCKevinTest folder.
    3. Imported the same FBX file directly into UE5 without using the plugin and placed it in the CCKevinTestNoCCPlugin folder.
    4. Both versions were added to a Level Sequence and played back at the same time and in the same location for comparison.

As a result, we observed a clear difference between the two methods.
The animation imported using method 3 (without the plugin) more accurately matches what is seen in CC4, while the animation from method 2 (with the plugin) shows a slight discrepancy.
This difference is most noticeable when observing the position of the eye bones.
Although this is not demonstrated in the verification video, if an object like a pair of sunglasses is animated to follow the character’s head movement—rather than being attached via a socket—it becomes clear that the animation exported using method 2 does not stay perfectly in sync.
 Please refer to the attached image, which shows a comparison between characters animated with method 2 and method 3. In method 2, the sunglasses do not follow the head movement accurately.

For reference, we have also included the FBX animation file used for the sunglasses shown in the image.
If you wish to test the accuracy using this animation, please note that you will need to turn off the “First Frame in Bind Pose” option, which differs from the settings shown in the video.
Since the video exceeds 10MB, we have uploaded it to Google Drive along with the sunglasses FBX file. The download link is provided below.
https://drive.google.com/drive/folders/1liyueejm2HQ_wN4iD7rht1Me0kcUBBJu?usp=sharing
Attachment:
  • Animation_misalignment.png
Feedback Tracker Admin 
Hi yoichi.nakai，

Thanks for your Feedback, 

Cause we can't reproduce this issue, can you help me record a complete video of the process from output to discovering the angle discrepancy?
Please attach the file in your next comment. If the file size is larger than 10MB, you can use cloud services such as Google Drive, Dropbox or OneDrive to make the files available to us and put the link in your comment. You can use Private Comment if you want to keep it private.

JoePan
Reallusion
1