Illustration of the reduced V-band surface brightness of the bulge and disk (upper and lower row, respectively) as a function of galactocentric radius R^⋆ and redshift in the case of simulations based on 13.7 Gyr old SEDs (left) and those employing an EvCon approach (right). The disk follows a similar evolution across z for both types of simulations, showing a minor dimming from z = 3 to z ∼ 1, followed by a brightening by ∼0.7 mag at a lower redshift. The situation is different for the bulge, which in the case of single-age simulations experiences between z = 0 and z ∼ 1 a dimming by > 5 mag (cf. Fig. 2). EvCon simulations (cf. Fig. 6) indicate a dimming by ∼1.5 V mag from z = 0 and z ∼ 1 that is followed by a brightening by up to 2 mag at a larger redshift.