Evolution of the Lyα (blue lines) and UV continuum (red) escape fraction as a function of the dust optical depth () for a homogeneous (triangles), a weakly clumpy (squares), and an extremely clumpy (spheres) medium. In these simulations, we adopt FF = 0.23, CF = 0.997 (R_min = 49 and R_max = 64 cells), = 10¹⁹ cm^-2, v_exp = 0 km s^-1, and b = 40 km s^-1. For comparison, the UV escape fractions (Fig. 4) are overlaid (red lines). For the extremely clumpy medium we note that for larger than a certain limit τ_c (here roughly equal to 3.5), f_esc(UV) drops below f_esc(Lyα).