Examples of photon trajectories. The left panel shows a photon escaping through the random walk from a static medium with (N_HI,cl,f_c) = (10²⁰ cm^-2, 100). In the central panel the photon escapes in an excursion [(N_HI,cl,f_c) = (10¹⁷ cm^-2, 100)] after a random walk and in the right panel nearly directly through excursion/single flight due to movement of the clumps [( N_HI,cl,f_c,σ_cl) = (10¹⁷ cm^-2, 100, 100 km s^-1)]. In each panel, the escape frequency x is shown along with the total number of scatterings n, and the distance traveled d. In addition, the color coding represents the frequency of the photon (truncated at ± 5). An animated version of this figure is available online.