No tracks (this data source does not have them) -- just jets as solid cones, leptons/photons as lines, MET as a dashed arrow, all from the primary vertex. This is the same construction as Figs.~ttbar_3d/vtx_3d with the track layer removed, demonstrating that building a 3D counterpart for Sect.~sec:case_study would be a small extension, not a rewrite.