[HELP] FBXLoader SkinnedMesh does not scale with the model?

[ViniciusFranciscoXavier]

Problem URL: https://viniciusfxavier.github.io/threejs/learning-3-test/dist/index.html
Source Code: https://github.com/ViniciusFXavier/threejs/blob/e5605428da908a1c1534c7f93af96c09de90f436/learning-3-test/src/index.ts#L33

If I scale down my model below 1 the animation breaks:
This break the animation -> object.scale.multiplyScalar(0.1);

Using object.scale.multiplyScalar to change model size below 1 break the animation.

object.scale.multiplyScalar(0.1); // Problem

It works -> object.scale.multiplyScalar(1);

 const loader = new FBXLoader().setPath('https://viniciusfxavier.github.io/threejs/learning-3-test/src/models/');
  loader.load('SillyDancing.fbx', (object: any) => {
    object.scale.multiplyScalar(0.1); // Problem

    object.mixer = new THREE.AnimationMixer(object);
    mixers.push(object.mixer);

    var action = object.mixer.clipAction(object.animations[0]);
    action.play();

    object.traverse((child: any) => {
      if (child.type === 'SkinnedMesh') {
        if (child.name !== 'Character_Dummy_Male_01') {
          child.visible = false;
        }
        child.material = new THREE.MeshLambertMaterial({ color: 0xdddddd, skinning: true });
      }
    });

    const skeletonHelper = new THREE.SkeletonHelper(object);
    skeletonHelper.visible = true;
    scene.add(skeletonHelper);
    scene.add(object);

    render();
  });

Animation from https://www.mixamo.com/#/

• Name: Silly Dancing

[ViniciusFranciscoXavier]

Same problem find here: SkinnedMesh scaling
Any help ?

[Mugen87]

I’ve downloaded the skinned mesh with the respective animation from Mixamo and imported the FBX file into the three.js editor. I was able to scale down the mesh but still playback the correct animation. Here is the asset: Silly Dancing.fbx (2.3 MB)

BTW: When importing the FBX file into the editor and selecting the respective root object, the following UI in the menu should appear:

Hit play to playback the animation.

[seanwasere]

I have done something very similar, but I didn’t get your problem.
To scale the fbx, I used

object.scale.set(.01, .01, .01);

See my example at https://sbcode.net/threejs/fbx-animation/
You can see the javascript source by pressing the <> button in the view.

Edit
Actually, what I think your problem might be, is that your imported animation clip contains a VectorKeyframeTrack that affects your models position. In my example, the goofing running has a VectorKeyframeTrack which modified the position, so I delete it from the array after loading it into memory so that the model stays in the same position.

I delete that VectorKeyframeTrack at 0 by using

fbxLoader.load('models/vanguard@goofyrunning.fbx', (object) => {
  object.animations[0].tracks.shift();
  ...

[Scott_Petrovic]

Years later I find this while trying to deal with the same thing. I was originally struggling with trying to scale down the skinned mesh or skeleton objects, but that was leading to odd results. This simple object scale right when it imports does the tricky perfectly in 2026! Thank you