Guided
@Serializable
An intersection of a AnimationEvent.GuidedPathDefined: name at world position (x,y,z). Coordinates come from the guide path itself, which carries them for exactly this purpose.
z defaults to zero, so a payload recorded before heights existed decodes as the flat network it described. Nothing else needs a height: a transporter is reported by zone rather than by position, and the renderer interpolates between the two ends of a link -- so a cart on a lift climbs for the same reason a cart on an aisle moves sideways, and there is no second place to get it wrong.