Comparison of the overall magnitude-morphology relations in several redshift bins. The red solid and blue dashed lines denote the training and target samples, respectively. Left panel: the mean half-light radius as a function of r-band magnitude, whilst the right panel presents the mean ellipticity as a function of r-band magnitude. The statistical uncertainties shown are calculated from 500 bootstraps. Left panel: the histograms of the normalised magnitude distributions, demonstrating that the extra high-redshift bright galaxies in the simulation contribute little to the overall population.