Structure identification in the OMC-2 region at different stages of the HiFIVE analysis. From left to right: (a) Trees, (b) Branches, and (c) Leaves (see text for a description). For simplicity, only those velocity structures extracted from the same initial tree are displayed in colors. The rest of the positions analyzed by HiFIVE are indicated by gray crosses. We notice that, although satisfactory in most cases, our HiFIVE analysis fails to describe some of the undoubtedly more complex gas substructure found in the ISF (e.g., fiber #37, see central leave shown in red).