Hi,
I’m trying to copy the UE5 Mannequin Control Rig over to a character that’s using the UE4 Mannequin skeleton as the project I’m doing utilizes characters with UE4 skeletal structure.
As more or less expected that leads to a few problems, as UE4 Manny skeleton has less bones than the UE5 skeleton. The problems are the following:
#1 There’s an unexpected twist in the torso area
#2 The Neck and Spine IK/FK switches are unstable, using them dislocates controls rather than properly snapping them to IK and FK controls. Screenshots for this problem were taken after fixing problem #1 in the way described below.
The first one can be easily fixed by replacing all Spine_04 references in the Rig Graph with Spine_03, there are Make Array nodes using Spine_04 which doesn’t exist in the UE4 Manny. However, I don’t know if this is a good or a bad fix - this is my first question.
The second one is something I’ve been dealing with for the past few days and I haven’t been able to fix it in any way, I’ve tried looking into all of the collapsed nodes in the neck and the spine Forwards Solve and Construction Event sequences, replacing unused controls with existing ones, but nothing was able to get rid of the instability.
My second question is - is it possible at all to copy a UE5 Control Rig to a UE4 Skeletal Mesh and get it to work perfectly, or is it impossible or maybe impractical for some reason? How do I fix the problem #2?
Here are the steps to reproduce these issues:
- Create a UE5 project
- Copy a CR_Mannequin_Body Control Rig to SK_Mannequin with the steps below:
a. Duplicate CR_Mannequin_Body
b. Open the new Control Rig
c. In the Rig Hierarchy, right click the Root bone, select Refresh / Select Mesh / SK_Mannequin
The Mannequin will now have problems #1 and #2; problem #1 will be visible immediately.
To reproduce problem #2, select global_ctrl and switch the neck and spine FK/IK switches in the Animation Channels a few times.