#### The models show

- Two unstable layers (two convection zones)
- Fluxes overlap only for cooler models (one or two convection zones)
- Overshoot above and below the unstable layers (one convection zone)
- Small deviations from radiative temperature stratification (no convection)

#### Future work

- Smaller acceleration of gravity
- Larger models (horizontal and vertical)
- Non-grey opacities
- Magnetic fields