Ratio of difference between the estimated and true SFR to the true SFR versus time for the entire MIRAGE sample. The solid lines indicate the mean value across all simulations whereas the shaded areas of the same colour indicate the standard deviation. The dashed lines indicate the mean value between 250 Myr and 790 Myr. The colour coding is the same as for Fig. 3. We see that except for the Lyman continuum, the SFR is systematically overestimated, from 24% on average for the FUV band to 65% on average for the U band. Peak relative differences reach ~0.7 for the Lyman continuum, ~1.9, ~2.1, and ~3.2 for the FUV, NUV, and U bands, and ~2.0 for the TIR.