Solution for a combination of shocks and PDRs, assuming an exponential probability distribution function. Solution for the fiducial model n_H = 10 cm⁻³, b = 0.1, G₀ = 10 shown in Fig. 3a. Observations are presented as blue stars (see Table B.2) and modeled intensities are shown as open black circles. Individual shock and PDR contributions are shown as green and orange solid lines, respectively.