Population-orbit model of the simulated galaxy TNG50 468590. The first column shows the mock data with, from top to bottom, surface mass density, mean velocity, velocity dispersion, GH coefficients h₃, h₄, mass-weighted age, and metallicity maps. The second column is the best fitting population-orbit model, and the third column shows the residuals of the data minus model, divided by the errors assigned assuming similar quality data as for NGC 1380.