@Override
    public void getOffsetTransform(Matrix4f outTransform, Matrix4f inverseModelBindMatrix) {
        modelTransformMatrix.mult(inverseModelBindMatrix, outTransform);
    }
This JointModelTransform implementation accumulate joints transforms in a Matrix4f to properly
support non uniform scaling in an armature hierarchy
jme3-core/src/main/java/com/jme3/anim/MatrixJointModelTransform.java