Luminosity from SKIRT radiative transfer (estimated at 1500 Å) on x axis is compared with LoS luminosities (as discussed in Vijayan et al. 2021) on y axis. Luminosity from the LoS method is roughly 0.25–0.3 dex higher than luminosities produced by radiative transfer. The red line is the best fit offset between the two luminosities. The colours corresponding to the colourbar shows the average stellar mass in each hexbin.