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Retargeting

Motorica Studio includes assets that demonstrate retargeting from the Motorica character to other characters.

For a list of all plugin assets, go here.

Note: Retargeting in UE 5.0 is not ideal. You are encouraged to use UE 5.1 and above. Example issues seen here and here.

Assets

First, enable "Show Plugin Content" in the Content Browser settings.

Then, navigate to Plugins > Motorica Studio Content. (The folders may look different depending on which version of Motorica Studio you are using.)

Retargeting folder

  • BP_RuntimeRTG_Base - A spawnable Actor Blueprint that sets up runtime retargeting between the Motorica skeleton and other skeletons. This blueprint serves as a base which other blueprints can extend from.
  • LS_RuntimeRTG - A Level Sequence asset demonstrating runtime retargeting from the Motorica skeleton to a set of other skeletons.

MetaHuman

  • ABP_metahuman_MoStudio - Animation Blueprint used for runtime retargeting from the Motorica skeleton to the MetaHuman skeleton. It uses the RTG_metahuman_MoStudio IK Retargeter asset.
  • BP_RuntimeRTG_metahuman_MoStudio - A spawnable Actor Blueprint that extends from BP_RuntimeRTG_Base. It sets up runtime retargeting from the Motorica skeleton to the MetaHuman skeleton using ABP_metahuman_MoStudio.
  • IK_metahuman_MoStudio - IK Rig asset that configures the default MetaHuman skeleton for retargeting. This is identical to the default MetaHuman IK Rig (confirmed UE 5.2).
  • RTG_metahuman_MoStudio - IK Retargeter asset that retargets from the IK_MoStudio IK Rig to the IK_metahuman_MoStudio IK Rig. The MetaHuman retarget pose is edited to match the T-pose of the Motorica skeleton. IK retargeting is disabled.

Mixamo

  • ABP_Mixamo_Mutant - Animation Blueprint used for runtime retargeting from the Motorica skeleton to the Mixamo Mutant skeleton. It uses the RTG_Mixamo_Mutant IK Retargeter asset.
  • BP_RuntimeRTG_Mixamo_Mutant - A spawnable Actor Blueprint that extends from BP_RuntimeRTG_Base. It sets up runtime retargeting from the Motorica skeleton to the Mixamo Mutant skeleton using ABP_Mixamo_Mutant.
  • IK_Mixamo_Mutant - IK Rig asset that configures the Mixamo Mutant skeleton for retargeting. It contains bone chains for the spine, legs, arms, head and root, excluding fingers.
  • RTG_Mixamo_Mutant - IK Retargeter asset that retargets from the IK_MoStudio IK Rig to the IK_Mixamo_Mutant IK Rig.

The assets above are for the Mixamo Mutant character. Other mixamo characters have similar assets.

MotoricaStudio

  • ABP_MoStudio - Animation Blueprint used for runtime retargeting from the Motorica skeleton to itself. It uses the RTG_MoStudio IK Retargeter asset.
  • BP_RuntimeRTG_MoStudio - A spawnable Actor Blueprint that extends from BP_RuntimeRTG_Base. It sets up runtime retargeting from the Motorica skeleton to itself using ABP_MoStudio.
  • IK_MoStudio - IK Rig asset that configures the Motorica skeleton for retargeting. It contains bone chains for the root, hips, spine, legs, arms, and head, except fingers. For compatibility, some bones like the root and shoulders have multiple chains. Find the ones that work best for you target skeleton. You can also copy the asset and customize the bone chains completely to improve retargeting to your character. Most IK Retargeter assets in the plugin use this IK Rig as the retargeting source.
  • IK_MoStudio_legacy - This is the legacy IK Rig asset that was provided in Motorica Studio v0.1.0 called IK_Motorica. You should use IK_MoStudio from now on. If you are using the old IK_Motorica IK Rig, update your references to point to IK_MoStudio_legacy.
  • RTG_MoStudio - IK Retargeter asset that retargets from the IK_MoStudio IK Rig to itself. This is mainly used for debugging purposes.

UE5 Mannequin

  • ABP_Mannequin_MoStudio - Animation Blueprint used for runtime retargeting from the Motorica skeleton to the UE5 mannequin skeleton. It uses the RTG_Mannequin_MoStudio IK Retargeter asset.
  • BP_RuntimeRTG_Mannequin_MoStudio - A spawnable Actor Blueprint that extends from BP_RuntimeRTG_Base. It sets up runtime retargeting from the Motorica skeleton to the UE5 mannequin skeleton using ABP_Mannequin_MoStudio.
  • IK_Mannequin_MoStudio - IK Rig asset that configures the default UE5 mannequin skeleton for retargeting. This is identical to the default UE5 mannequin IK Rig (confirmed in UE 5.2).
  • RTG_Mannequin_MoStudio - IK Retargeter asset that retargets from the IK_MoStudio IK Rig to the IK_Mannequin_MoStudio IK Rig. The UE5 mannequin retarget pose is edited to match the T-pose of the Motorica skeleton. IK retargeting is disabled.

How-To

A detailed guide on how to do retargeting is missing. For now, you are encouraged to explore the included retargeting assets in the Content Browser yourself. Open them to see how retargeting is configured, specifically the IK Rig and IK Retargeter assets.

You can also refer to these YouTube tutorials for more information:

Lastly, feel free to reach out on our Discord server.