Default will use all possible sources in the following order SplineUserParameter - if change will reset the system SoftSourceActor - looks for the first spline component on the root actor AttachParent - looks for the first spline component on the attached parent
AttachParentOnly
AttachParent - looks for the first spline component on the attached parent Will check every frame to see if it has changed
ParameterBindingOnly
SplineUserParameter - if change will reset the system Will check every frame to see if it has changed