Spatial distribution of transmitted Lyα photons for the snapshots at 1/1.5/2 Gyr (left to right). In contrast to Fig. 5, we show only the photons that escaped face-on toward the positive z-axis (top), edge-on (middle), and face-on toward the negative z-axis (bottom). Photons within a range of ±10° of the principal direction were considered. Shown are the central 40 kpc of the disk.