Spatial distribution of the surface brightness [W m⁻² sr⁻¹] of the 11.25 µm AIB, the 11.25/11.207 µm and 11.25/11.2 µm surface brightness ratios, the O I 1.317 µm fluorescence line [erg cm⁻² s⁻¹ sr⁻¹] from Peeters et al. (2024), and the H₂ 0-0 S(3) line [W m⁻² sr⁻¹] at 9.664 µm from Sidhu et al. (in prep.). The black contours in the top right panel correspond to I_11.25 = 1.25 × 10⁻⁵ W m⁻² sr⁻¹. In the top middle and right panels, the white and teal contours trace peak emission for the 11.0 µm and the 11.2 µm band, respectively, and the black contour corresponds to a 11.25/11.207 ratio of 0.8. In the bottom left panel, the dashed black line represents the “secondary ridge” discussed in the text. θ¹ Ori C is located toward the top right of each map (see Fig. 2). In each map the range of the corresponding color bar is set between 0.5% and 99.5% percentile level for the data. The zero pixels, and in the maps based on the MIRI FOV, the edge pixels, and pixels covering the two proplyds, indicated by the black circles, are masked out. The rectangular apertures of the template spectra for the H II region, atomic PDR, DF 1, DF 2, and DF 3, from top to bottom, are shown in white and the solid white lines delineate the IF and the three DFs, DF 1, DF 2 and DF 3.