Comparisons of the line ratio plots between the observations and the simulated samples generated by assuming the foreground screen dust model (left) and the uniform mixture model (right). In each panel, the filled contours and black contour lines indicate the spaxel distributions of the observed and simulated samples, respectively, both of which enclose 68%, 95%, and 99% of the corresponding samples from inner to outer. The magenta (blue) curve and shaded regions denote the medians and their 3σ uncertainties for the observed (simulated) sample, respectively. Regions around the cross points of the intrinsic line ratios are zoomed in and shown in the lower-left insets. The SSIM index describing the similarity in density distribution between the observed and simulated data is listed in the lower-right corner of each panel. Other symbols are the same as those in Fig. 2.