Ready Player Me to Unreal Engine 5: A Manny-Skeleton Rig That Keeps the Avatar’s Skin
By the Cosindra team · Updated September 4, 2026
Ready Player Me avatars export as a GLB on a Mixamo-style skeleton with the platform’s own skin weights — good weights, wrong skeleton for Unreal Engine 5. You can retarget in UE with the IK Retargeter, and for a single avatar that is a reasonable afternoon. For a game that will onboard many avatars, or for a team that wants Epic’s animation packs to just work, rigging the avatar to the Manny skeleton once is the shorter road.
RigMaster does that in the browser: it keeps the Ready Player Me skin, replaces the skeleton with UE5 Manny, places the joints where the avatar’s own skeleton had them, and exports an FBX Unreal imports onto SK_Mannequin.
Before you export
- Use a full-body avatar. Half-body (bust) avatars have no legs to rig and are not supported.
- Download the avatar as GLB — the standard Ready Player Me download. Textures are embedded; nothing else is needed.
- Avatars come in a neutral pose already; there is no T-pose requirement.
Step by step
- Upload the GLB to RigMaster and place the guide markers. On a Ready Player Me avatar the markers register scale, facing and depth; the limb and finger joints are then adopted from the avatar’s own skeleton, so the rig lands where the platform’s weights expect it.
- Pick the rig options. The Pro rig’s pose correction re-poses the avatar into Manny’s rest before binding, and hand alignment sets the finger rest to Manny’s so hands animate like the mannequin’s. Keep artist’s hands turns the hand alignment off if you prefer the avatar’s own finger pose.
- Download the FBX. Import it into UE5 choosing the existing SK_Mannequin skeleton, then assign Manny/Quinn animations directly — no IK Rig, no chain mapping, no retarget pose.
What lands in Unreal
- A skeletal mesh on the real Manny skeleton (89 bones, matching names, hierarchy and roll), exported in centimetres at the mannequin’s stature — default import scale, no unit fixes.
- The avatar’s original skin weights, with joints adopted from its skeleton: measured on authored skins, finger joints sit within about 2 cm of the phalanx they drive, which is what keeps fingers from folding into spikes under animation.
- Blendshapes (the avatar’s facial morphs) as morph targets, textures packed with the FBX.
Where the retargeting route still makes sense
If your project already runs on the Ready Player Me skeleton with its own animation set, and you only want to borrow a few Manny clips, retargeting those clips is less work than re-rigging the avatar. The rig-to-Manny route pays off when Manny/Quinn animations are the base of the project — engine locomotion, Lyra, Fab packs — and every avatar that enters the game should play them on day one.
Skip the rigging chapter entirely
RigMaster rigs your humanoid mesh to the UE5 Manny-compatible skeleton in the browser: upload a GLB, place a few markers, download a UE-ready FBX that plays Manny/Quinn animations without retargeting.
Rig my characterFrequently asked questions
Does this work with half-body Ready Player Me avatars?
No. RigMaster rigs full humanoids; export a full-body avatar.
Are the Ready Player Me skin weights kept?
Yes, when the authored skin is recognized — which is the case for standard full-body exports. The skeleton becomes Manny; the weights stay the platform’s.
Do I still need the IK Retargeter for Manny animations?
No. The output skeleton is Manny’s, so Manny/Quinn animations are assigned directly. Retargeting exists to bridge two skeletons; after RigMaster there is one.
Can I automate this for many avatars?
RigMaster is a browser tool today — one avatar per upload. If you need batch rigging for a live avatar pipeline, contact us; that is a different product shape than the web tool.