Unit Scale
Unreal Engine uses a unit scale of 0.01, while Blender's default unit scale is 1.0.
This discrepancy can cause issues in Unreal Engine, particularly with Physical Assets, because the engine do not rescale all data correctly.
To address this, when the scene's unit scale is not 0.01, my addon will automatically rescale the Armature, Rig data, and Meshes, then will set the unit scale to 0.01 before export. In most cases, this resolves the native export/import scales issues from Blender to Unreal.
However, if your rig uses scaling data as a reference, it may break at the rescale.
Therefore, I recommend working with a 0.01 unit scale in Blender from the start, using a Rig that is designed for this scale.
This approach avoids Rig rescale at the export and Skeleton rescale at the import in Unreal.
You can change the scene Unit Scale in:
Properties -> Scene -> Units -> Unit Scale
You can disable addon rescale in:
Blender Preferences -> Add-ons -> Unreal Engine Assets Exporter -> SKELETON & ROOT BONE -> Rescale Export Rig
- BFU Docs: Skeleton & Root bone
- BFU Docs: UE Bone Structure and UE Mannequin
- For community support and discussions, join the discord BleuRaven Side Projects.