Video

1. Prepare Avatars

Prepare one avatar for the head and another for the body.

2. Align Neck Bone Position

Align the head Neck bone position to the body’s neck position as closely as possible.

3. Organize Head/Neck Bone Hierarchy

Reorganize the head and neck bones under the body hierarchy.

• Head neck bone -> under the body’s neck bone
• Head head bone -> under the body’s head bone

4. Organize Objects

• Move objects other than Armature into the target avatar
• Delete unnecessary source objects after cleanup

5. Reconfigure Avatar Descriptor

Readjust Viewpoint, Lip Sync, and Eye Look based on the merged head.

6. Check Base Materials

Match the base material tone between face and body first, then identify where neck seams are noticeable.

7. Set Up Merge Tool Component

1. Create an empty GameObject
2. Add [Merge Tool] component
3. Assign face/body Mesh Renderers respectively

8. Select Vertex Pairs and Apply

1. Click [Start Select Vertex Pair]
2. Alternate selection: 1 face mesh vertex -> 1 body mesh vertex
3. If vertex counts differ, use Split Face Edge / Split Body Edge to assist
4. Click [Apply] when finished

If the editor handle is not visible, enable Gizmos in Scene View.

9. Verify Result

Check whether the seam is smoothly connected.

10. Finalize Texture/Material

Finally, match face/body color and material settings to finish.