Vertical cuts through the rMHD snapshot intersecting the y-axis at the EB location y = 10.7 Mm. Left column: statistical equilibrium (SE) He I, II, and III population relative to the total population. Right column: LTE He I, II, and III populations relative to the total population. h_{max, 10 830} (solid line) and h_max, D3 (dash-dotted line) are plotted in the upper left panel; see the definition in Eq. (2). The white boxes in the left panels indicate the region that we zoom into in Figs. 10, 11, and 13.