Spatial distributions of stellar mass for model-decomposed structures in Au-23-85-50 compared with their true counterparts. The top three rows display the true mass surface densities of Au-23 projected onto the internal x-y, x-z, and y-z planes, while the bottom three rows show the model-predicted results for Au-23-85-50, with the central mass density normalised to unity. From left to right, the panels show the mass surface densities of the entire galaxy, the bar, the bulge, the disc, and the stellar halo. The mass fractions of all components were calculated within the 60 × 60 × 30 arcsec³ volume (aligned with the axis ranges in the panels), with their values shown in the text.