Halo-level validation of the reconstruction in the IllustrisTNG300-1 simulation. Left panel: comparison between the projected masses integrated within R₂₀₀ in the ground-truth and reconstructed maps. Blue points denote individual dark matter halos, and black contours represent the number density of these halos. The red line shows the mean predicted mass within each true halo mass bin; error bars indicate the standard deviation. The black dashed line denotes the one-to-one relation between true and predicted halo mass. In the inset, the red and green lines indicate the mean (μ) and standard deviation (σ) of the residuals within each true halo mass bin respectively, with the gray dashed lines representing ±0.3 dex. Right panel: comparison between predicted projected mass within R₂₀₀ in the reconstructed map and M₂₀₀ of groups in the IllustrisTNG300-1 catalog. Visual conventions follow those used in the left panel. All halo masses are given in units of M_⊙ and shown on a logarithmic scale.