Amplitude growth of the v_y field in the KH instability test for all calculated models. Solid lines correspond to α_min = 0.05, while dashed lines are from the models with increased AV (α_min = 0.5). Those with a density jump by a factor of 2 are compared with the reference PENCIL simulation in the left panel. Right panel: two simulations with a density jump by a factor of 8 for both choices of the VEs.