Mosaic of gray‐scale images showing several externally illuminated YSOs in each of the observed filters. Each image is 100 × 100 pixels on a side, corresponding to an angular scale of 4﹩\farcs﹩55 or 1956 AU at the assumed distance of 430 pc in the PC. The eighth and tenth rows use WF data in which the 100 × 100 pixel field corresponds to 10^{﹩\arcsec﹩}, or 4300 AU. The columns (left to right) show images in the continuum (F547M), [O III] (F502N), [O I] (F631N), Hα (F656N), [N II] (F658N), and [S II] (F673N). The rows show externally illuminated YSOs in order of increasing distance from θ¹ Ori C (top to bottom). Note the systematic variation of source properties with projected distance, such as the increased radii of the IFs, the disappearance of the [O III] + Hα arcs, the larger sizes of embedded silhouettes, and the disappearance of the IFs.