Radiative energy exchange rates in three columns of the last snapshot of the time series of the three stars (different panels). The red curves show an example of Q in the intergranular lanes with large χ_C; the black curves show an example of Q in the intergranular lanes with small χ_C; the blue curves show an example of Q in the granules with large χ_H. Solid lines correspond to the ODF; dashed, to 18 bins; dashed-dotted, to four bins; and dotted, to grey opacity. The position x, y of the selected columns in the stellar domain are written in Mm.