First panel: fraction of simulations in which the rms is higher in Y than in X direction for ΔT_spot1 (solid) and ΔT_spot2 (dashed). The colour code represents different θ_max values: solar (red), solar+10° (green), solar+20° (blue), and all (black). Second panel: same for the fraction of simulations with a positive skewness in the Y direction. Third panel: distribution of the angles at which the skewness in Y is highest (ΔT_spot1 only) for the ten inclinations (same colour code as Fig. 3). Fourth panel: same for ΔT_spot2.