Properties of real filaments (total flux, peak flux, and FWHM) identified in the N₂H⁺ (1−0) integrated intensity maps of OMC-3 (see Fig. 17). All panels display the values obtained from the ALMA 12m-alone (yellow dots) and ALMA 12m+ IRAM-30m Feather (blue triangles) compared to those obtained form the combination of the ALMA 12 m array + IRAM-30 m using the MACF (flux, I₀, and FWHMo) method assumed as reference. A perfect agreement between these methods is indicated by a grey line. Predictions form simulations are displayed by the grey dashed line. From top to bottom: Percentage of emission recovered along the entire radial profile; intensity peak FWHM estimated from the Gaussian fit; and FWHM estimated from the Gaussian fit. In all cases, the values are represented as function of the reference filament FWHM₀ derived from the ALMA 12 m array + IRAM-30 m MACF map.