Magnetic field lines at t = 11 040 s belonging to a flux rope as analyzed in Robinson et al. (2022), with a bisecting plane colored by saturated α values (left). The right panel is the same as left panel, with the addition of lines corresponding to the wider flux rope that was first seeded by its proximity to the thin current sheets in the rope near the orthogonal slice, then seeded by corks that were geometrically closest to those lines at that time.