Left: distribution of maximum radial gas velocities in the full 3D shockwave of the CO⁵BOLD model st28gm06n26, the same snapshot as shown in the top panel of Fig. 2. The lines indicate the corresponding radial velocities for the DARWIN model l70t27 for u_p = 2 and 4 (grey and black), and the maximum velocity in one direction in the CO⁵BOLD model st28gm06n26 (green here, the direction is indicated by black dashed line in the top panel of Fig. 2). Right: radial velocity against the radial distance, for the different models. The shock front of the CO⁵BOLD x-dir, DARWIN u2, and DARWIN u4 are indicated. There is no clear shock front present for the CO⁵BOLD mean.