Hi there,
Have you tried to export your combined meshes as gltf instead of fbx? There’s a thread about it in this forum. I believe UE5.3 has a import dialog that allows you to merge/separate skeletal meshes. I’ll run an example and update this post.
Steps to reproduce:
- Export a Metahuman body to Blender and split the meshes: hands, pants, torso and arms
- Export as glTf 2.0 (Has no scale settings, you’ll need to adjust in UE)
- Import to UE 5.3 and the import option “Interchange Pipeline Configuration (Import Content)” pops up. Adjust the scale depending on your Blender scene units and object scale. Set 100 if your object is real world scale and scene’s unit scale is 1.
- Go to Skeletal mesh section and uncheck “Combine Skeletal Meshes”
Results:

