Vertical magnetic field at three selected heights for a snapshot of the D-AD run (upper row) and U-AD run (bottom row). The heights are indicated at the title of each panel. Notice the complex structure of fields in the D run, and the expansion of the magnetic field structures with height in both runs. Contours indicate the locations with zero vertical velocity at z = 0, highlighting the structure of granulation. The horizontal black line marks the location of cuts shown in Fig. 3 below.