This is a zoom-in on a single sightline whose spectrum is displayed in Figure 9. All pixels displayed fall within the same sightline. The colormap shows the z-position of the brightest emitting particles. The overlaid contours show the dust distribution, with the darkest contour denoting 1.2 × 10⁴ M_⊙ kpc⁻², the middle contour 6 × 10³ M_⊙ kpc⁻², and the lightest contour 2 × 10³M_⊙ kpc⁻².