Gallery of the first 72 halos of TNG-Cluster at z = 0, showing soft-band (0.5 − 2 keV) X-ray luminosity. The colormap is the same as Fig. 5. Each panel is 2r_vir across, while the white circles mark r_vir, and halo IDs are labeled. A variety of X-ray morphologies are evident, from relaxed, centrally peaked surface brightness distributions, to un-relaxed and binary merging clusters, triple and multi-component merging systems, and large-scale sloshing and gas displacement effects.