Root Bone is in the hip not the feet

Development Character & Animation
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1

Working on a project and I rigged a blender model through mixamo and then imported it into unreal. Now, the root bone is in the hips. How do I move it to the feet?

2

Follow these steps to change the root bone to one located between the feet:

  1. In Unreal Engine, open the skeleton and find the current root bone
  2. Open the skeleton in Blender, go to Edit Mode, and add a new bone (let’s call it RootBone) and move it between the feet.
  3. In Blender (Edit Mode), select the current root bone that you identified in Unreal Engine. Then, in the Properties panel go to Bone Properties > Relations and set Parent to RootBone
  4. Re-export the skeletal mesh, and re-import it, and you’re all set!

If you need any help with this. don’t be afraid to ask.

Hope it helps!

1 Like
3

I tried but it didn’t work

4

Does this really work? in UE5 it doesn’t work like that, I tried many ways

5

Having an issue where this makes my character face a different direction during animations… I tried exporting with different forward and up values but all of them seem messed up. The skeletal mesh seems fine though and all of the animations are okay in Blender. Any tips or advice would be greatly appreciated!

6

I just posted a video of our upcoming tool solving this with adding bones and doing a weight transfer : https://www.youtube.com/watch?v=1BLrMDrCOTA
While the tool isn’t out yet (it will be paid as well unfortunately), I’ve included the snippet in the video (and here as well) if you want to do this yourself inside UE:
Inject Root Bone: Inject Root Bone posted by qoobit | blueprintUE | PasteBin For Unreal Engine
Reorient Bone: Reorient Bone posted by qoobit | blueprintUE | PasteBin For Unreal Engine
Create Skin Weight Modifier: Create Skin Weight Modifier posted by qoobit | blueprintUE | PasteBin For Unreal Engine
Create Skeleton Modifier: Create Skeleton Modifier posted by qoobit | blueprintUE | PasteBin For Unreal Engine

If enough people need this functionality, I can throw together a free standalone plugin tool just for adding root bones for mixamo characters and doing the weight transfer from Hips.

1 Like
7

Hey , I am super excited about this tool! Do you have any plan to add this toFab ?

8

I just published this yesterday as a standalone tool (also added to the description of the video) at GitHub - qoobit/qoo_ue_root_bone_adder: Simple tool for adding a root bone to a skeletal mesh's skeleton.. I’ll need to prep some screenshots for this but ideally I should have something on fab later this week as a free plugin listing. It might get buried but if you’re in a rush feel free to grab it off github.