Comparison of input (x axis) and output (y axis) B/T ratios for multi-band fits (top) and single-band fits (bottom), for bright galaxies m_r,B+D,sim < 17.5 mag (left) and faint galaxies 18.5 mag < m_r,B+D,sim < 19 mag (right). Objects at (B/T)_r,fit < 0.2, and (B/T)_r,fit > 0.8 are plotted in green and red, respectively, other objects at intermediate B/T in grey. A one-to-one line has been over-plotted to guide the eye. The error bars represent median values and 30/70 percentiles in each bin of 0.2 width in (B/T)_r,fit.