Setup 2 with (red contour lines) and without a DM halo (black contour lines) at a maximum refinement level of 6. In the top left panel the contour lines represent the column density distribution log (N_HI) = 18.8   ...   21.2   Hcm^-2 in 0.6 dex after 100 Myr of simulation time. For the line-of-sight plots in the panels on the right side and the panel at the bottom left, contour lines are at log (N_HI) = 18,   19,   20,and21   H   cm^-2. The angle α determines the inclination of the line of sight, for details see caption of Fig. 4.