Histograms of the parameters derived for each dust model (relative dust abundances, intensity of the radiation field, and relative intensity of the NIR continuum; see Sect. 4.2) in the different gas phases (atomic in green, molecular in blue, and ionized in red). We notice a decrease of the intensity of the radiation field in the molecular phase, as well as an increase in the ionized phase, as compared to the atomic phase. We also observe an increase of the PAH relative abundance in the molecular phase (through a positive shift of the entire or part of the histogram in the molecular phase as compared to the atomic phase), and an increase of the VSG relative abundance in the ionized phase. The distribution of the NIR-continuum is more extended in the ionized phase than the ones in the atomic and molecular phases.