Three simulated galaxies with stellar masses 10⁹ M_⊙, 10¹⁰ M_⊙, and 10¹¹ M_⊙ show the mocking process. Panels on the left-hand side show the stellar mass density of the galaxies, while the central panels show their spectra at different radii (centre in blue, 0.5R_e in red, and 1R_e in yellow). Squared panels on the right-hand side show the stellar properties derived directly from the particles (top row for each galaxy) and recovered from the spectral cubes with PYPIPE3D (bottom row for each galaxy). From left to right, these panels show the V-band reconstructed image (mass density for the particle maps), luminosity-weighted age, luminosity-weighted metallicity, LsOS velocity, and velocity dispersion. As galaxy mass increases, the spectra are redder. Stellar maps are, in general, properly recovered.