EvCon simulation of a two-component galaxy that consists of a bulge (panel a) of solar metallicity that started forming 13.7 Gyr ago with an exponentially decreasing SFR (τ1 model) and a disk (panel b) of Z_⊙/5 forming at a constant SFR (solid curves) or an exponentially decreasing SFR with an e-folding time of 5 Gyr (τ5 model; dashed curves). Nebular emission is taken into account. A noticeable difference from simulations that involve SED templates of a fixed age (Fig. 2) is that the bulge gets brighter in the NIR with increasing z, reaching at z = 3 a δμ′ of −1.7 mag in H and −2.4 mag in K. Another salient feature is an initial dimming in μ′ of up to ∼2 mag for optical filters at 0.5 ≲ z ≲ 1.5 that is followed by a reversion to negative values at higher z, with the brightening, δμ′, of the bulge in the optical becoming equal to that in the NIR at various z between 1.2 and 3, depending on filter. As for the disk, EvCon simulations do not drastically differ from those assuming a present-day SED (panel b in Fig. 2) because of the mild evolution of the SED implied by continuous SF. The effect of the τ5 SFH model for the disk is illustrated with dashed curves. The layout is similar to that of Fig. 2. The arrows in panel a mark the redshift at which the Lyα line enters the blue edge of the U and B filter.