OptionalframeFrame FollowRig.offset is read in. Default "world".
OptionaloffsetOffset from the target; copied. Default (0, 0, 0).
OptionalspringSmoother for the placement; omitted means the rig snaps. Held by reference.
OptionaltargetWhat the rig follows. Defaults to nothing, which makes the rig idle.
Options for FollowRig (§44 follow rig and spring arm).