Average difference of recovered and true bulge/total ratios, (B/T)_r,fit – (B/T)_r,sim, measured in multi-band fits as a function of (B/T)_sim and m_r,B+D,sim. Sizes of the symbol represent the average offsets between measured and true B/T measured for a given sample, in other words an ideal fit would show no offset (small boxes) over the entire plot range. Green, filled boxes indicate positive values (B/T is overestimated), red, empty boxes indicate negative values. In the range 0.2 < (B/T)_sim < 0.8, the measured values agree relatively well with the simulated values. At (B/T)_sim < 0.2 and (B/T)_sim > 0.8, however, the measured values are systematically biased towards more intermediate values. Only bins with more than 20 objects are shown, to ensure reasonable number statistics in each bin.