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ue5-mixamo:ue5-runtime-retargeting

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ue5-mixamo:ue5-runtime-retargeting [2025/12/01 16:17]
Staff 		ue5-mixamo:ue5-runtime-retargeting [2025/12/05 14:30] (current)
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 For this example we will use the Third Person project template. For this example we will use the Third Person project template.
-{{ :ue5-mixamo:third-person-project.png?direct |}}+{{ :ue5-mixamo:third-person-project.png?direct |The Thrid Person template can be selected when creating a new project, or added to an existing project with the 'Add Feature or Content Pack' option in the Content Browser window.}}
  
 ==== Step-by-step ==== ==== Step-by-step ====
  
 1. Import your Mixamo character and retarget with the plugin picking the //SK_Mannequin// as the target. 1. Import your Mixamo character and retarget with the plugin picking the //SK_Mannequin// as the target.
-{{ :ue5-mixamo:runtime-retarget.png?direct |}}+{{ :ue5-mixamo:runtime-retarget.png?direct |Retarget the Mixamo skeleton to the Third Person Mannequin}}
 See our [[https://www.unamedia.com/ue5-mixamo/docs/tutorial/|Getting Started]] guide for more information on the retargeting process. See our [[https://www.unamedia.com/ue5-mixamo/docs/tutorial/|Getting Started]] guide for more information on the retargeting process.
  
 2. Create a new animation blueprint for the Mixamo character by right clicking on the skeleton asset and selecting //Create > Anim Blueprint//. This will be used to perform the run-time retargeting on the Mixamo character. 2. Create a new animation blueprint for the Mixamo character by right clicking on the skeleton asset and selecting //Create > Anim Blueprint//. This will be used to perform the run-time retargeting on the Mixamo character.
-{{ :ue5-mixamo:runtime-create-abp.png?direct |}}+{{ :ue5-mixamo:runtime-create-abp.png?direct |Create a new animation blueprint for the Mixamo character}}
  
 Open the animation blueprint, add a //Retarget Pose From Mesh// node and connect it to the //Output Pose//. In the details panel for the node, make sure the //Retarget From// option is set to //Parent Skeletal Mesh Component//, and set the //IKRetarget Asset// to the Mannequin-to-Mixamo retargeter asset generated by the plugin (//RTG_Mannequin_<Mixamo-Skeleton>//). Open the animation blueprint, add a //Retarget Pose From Mesh// node and connect it to the //Output Pose//. In the details panel for the node, make sure the //Retarget From// option is set to //Parent Skeletal Mesh Component//, and set the //IKRetarget Asset// to the Mannequin-to-Mixamo retargeter asset generated by the plugin (//RTG_Mannequin_<Mixamo-Skeleton>//).
-{{ :ue5-mixamo:runtime-abp-setup.png?direct |}}+{{ :ue5-mixamo:runtime-abp-setup.png?direct |The 'Retarget Pose From Mesh' node runs the IK Retargeter using the animation from the parent skeletal mesh as the input pose }}
  
 3. Create a new child blueprint (or duplicate) of the third person blueprint //ThridPerson > Blueprints > BP_ThirdPersonCharacter//. 3. Create a new child blueprint (or duplicate) of the third person blueprint //ThridPerson > Blueprints > BP_ThirdPersonCharacter//.
-{{ :ue5-mixamo:runtime-child-blueprint.png?direct |}}+{{ :ue5-mixamo:runtime-child-blueprint.png?direct |Create a child from the Third Person character blueprint }}
  
 Open the new blueprint and add the Mixamo skeletal mesh as a child of Mannequin skeletal mesh. Set the //Anim Class// for the Mixamo mesh to the Animation Blueprint created in step 2. Open the new blueprint and add the Mixamo skeletal mesh as a child of Mannequin skeletal mesh. Set the //Anim Class// for the Mixamo mesh to the Animation Blueprint created in step 2.
-{{ :ue5-mixamo:runtime-blueprint-mixamo-mesh.png?direct |}}+{{ :ue5-mixamo:runtime-blueprint-mixamo-mesh.png?direct |Add the Mixamo skeletal mesh to the blueprint}}
  
 Now hide the Mannequin mesh by unchecking the //Visible// option and set the //Visiblity Based Anim Tick Option// to //Always Tick Pose and Refresh Bones// - this setting allows the animation to update when the mesh is hidden. Now hide the Mannequin mesh by unchecking the //Visible// option and set the //Visiblity Based Anim Tick Option// to //Always Tick Pose and Refresh Bones// - this setting allows the animation to update when the mesh is hidden.
-{{ :ue5-mixamo:runtime-blueprint-hide-mannequin.png?direct |}}+{{ :ue5-mixamo:runtime-blueprint-hide-mannequin.png?direct |Hide the Mannequin mesh}}
  
 4. Open the Game Mode asset //ThirdPerson > Blueprints > BP_ThirdPersonGameMode// and change the //Default Pawn Class// to the new blueprint. 4. Open the Game Mode asset //ThirdPerson > Blueprints > BP_ThirdPersonGameMode// and change the //Default Pawn Class// to the new blueprint.
-{{ :ue5-mixamo:runtime-game-mode.png?direct |}}+{{ :ue5-mixamo:runtime-game-mode.png?direct |Edit the Third Person game mode asset}}
  
 Open the third person demo level (//ThirdPerson > Lvl_ThirdPerson//) and click play. You should now see the third person game running with your Mixamo character instead of the Mannequin. Open the third person demo level (//ThirdPerson > Lvl_ThirdPerson//) and click play. You should now see the third person game running with your Mixamo character instead of the Mannequin.
 {{ :ue5-mixamo:runtime-result.jpg?direct |}} {{ :ue5-mixamo:runtime-result.jpg?direct |}}
 +
 +===== Optimising Runtime Retargeting Performance =====
 +==== IK Retargeter ====
 +As of UE 5.7, the IK Retargeter now includes some options for optimisation.
 +
 +**Op Stack Profiling**\\ 
 +Enabling the //Profile Ops// option in the Asset Settings will display how much time is taken to process each retargeting operation in the Op Stack along with the total time at the top.
 +{{ :ue5-mixamo:retargeter-profiling.jpg?direct |Enabling Op Stack Profiling}}
 +
 +**Retarget Operation LoD**\\ 
 +Each retarget operation now has it's own //LODThreshold// setting that can be used to disable the operation based on the current LoD of the character.\\ 
 +A good candidate for this setting is the //Run IK Rig// operation, which is relatively expensive to run, and can likely be safely disabled at a distance where the difference in retargeting accuracy wouldn't be so noticeable.
 +
 +==== IK Rig Optimisation ====
 +The IK Rig assets generated by the plugin use a standard Full Body IK solver. This is a high quality IK solution that allows the whole body move naturally in order to reach target IK goal positions. It's the best option for IK Retargeting and offline generation of retargeted animation assets, however it can be expensive for runtime application.
 +
 +A similar result can be achieved by replacing the Full Body IK with a Body Mover and Limb IK Solvers. This is cheaper to run, and it most situations only has minor differences in results.
 +{{ :ue5-mixamo:ikrig-compare.gif?direct |Retargeting with the default FBIK compared to the optimised Limb IK setup}}
 +
 +**Optimised IK Rig Setup**\\
 +1. Create a duplicate of the generated Mixamo character IK Rig asset and open it. In the Solver Stack, click on the bin icon next to the Full Body IK solver to remove it.
 +{{ :ue5-mixamo:ikrig-remove-fbik.png?nolink |Remove the FBIK solver}}
 +
 +2. Click the Add New Solver button to add a Body Mover solver, followed by four Limb IK solvers.
 +{{ :ue5-mixamo:ikrig-new-solvers.png?nolink |Setting up the new IK solvers}}
 +//Note: This stack is executed in sequence from top to bottom, so the body mover need to be first for the correct result.//
 +
 +3. Select the Body Mover solver, then right click on the Hips bone in the hierarchy and select //Set Start Bone on Selected Solver//. Then select the IK Goal for each Limb (displayed with a yellow box icon) and right click and select //Connect Goal to Selected Solver//.
 +{{ :ue5-mixamo:ikrig-bodymover.png?direct |Body Mover solver setup}}
 +In the Details panel, set the //Rotation Alpha// and //Position Positive Z// weights to zero. This will remove unwanted body rotation and prevent the character from floating in the air to reach IK target positions.
 +{{ :ue5-mixamo:ikrig-bodymover-settings.png?direct |Body Mover solver weight settings}}
 +
 +4. Now set up a Limb IK solver for each arm and leg by assigning a start bone and IK goal. For the arms set the start bone to LeftArm / RightArm, and for the legs set the start bone as LeftUpLeg / RightUpLeg.
 +{{ :ue5-mixamo:ikrig-limbik.png?direct |Correct Limb IK setup}}
 +
 +5. Finally, open the IK Retargeter asset, and in the Asset Settings, set the Default Target IK Rig to the new optimised rig.
 +{{ :ue5-mixamo:ikrig-retargeter-setting.png?direct |IK Retargeter setup}}
ue5-mixamo/ue5-runtime-retargeting.1764602255.txt.gz ยท Last modified: 2025/12/01 16:17 by Staff

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