class RenderSkeletonBone_t
{
public:
    CUtlString m_boneName;
    CUtlString m_parentName;
    matrix3x4_t m_invBindPose;
    SkeletonBoneBounds_t m_bbox;
    float32 m_flSphereRadius;
};

KV3 Class Defaults

{
    m_boneName = ""
    m_parentName = ""
    m_invBindPose = 
    [
        1.0, 0.0, 0.0, 0.0,
        0.0, 1.0, 0.0, 0.0,
        0.0, 0.0, 1.0, 0.0,
    ]
    m_bbox = 
    {
        m_vecCenter = [ 0.0, 0.0, 0.0 ]
        m_vecSize = [ 0.0, 0.0, 0.0 ]
    }
    m_flSphereRadius = 0.0
}