Schematic illustration of the geometric origin of near–far side brightness asymmetry in an inclined dust disk. The white dashed line marks the disk midplane in a meridional cross section. If the dust is completely settled to the midplane, pairs of sight lines symmetrically displaced about the central LOS intersect the disk at the same radius (e.g., the top and bottom dashed lines), producing a symmetric brightness distribution. For a vertically extended, optically thick dust layer, two distinct cases are illustrated by thick black horizontal lines (Case 1) and thick blue tilted lines (Case 2, more edge-on sight lines). In both cases, the sight lines on the far side are brighter than their symmetric counterparts on the near side (see discussion in the main text). The blue and red arrows indicate the blueshifted and redshifted outflow lobes, respectively; the former is projected onto the far side of the disk, providing an independent observational test of the geometric interpretation of the observed near–far side brightness asymmetry.