(a) Angular structure of the overshooting layer after 114τ_conv of steady-state convection in the simulation of the 6 M_⊙ Cepheid. The overshooting length in this illustration is determined by zeros of the vertical kinetic flux. The Schwarzschild convective boundaries between the convection zone and the neighboring stable radiative zones are indicated by a solid black line. The stellar radius (r/R) is indicated on the left axis, and the overshooting length is given in units of the pressure scale height H_p, CB at the convective boundaries on the right axis. A dashed line indicates the average overshooting length at this time. (b) The same, but plotted over a visualization of vorticity. White dashed lines indicate the Schwarzschild boundaries.