Projection map of mass (left) and radio surface brightness (right column) of the same cluster merger in the TNG300-1 (top), TNG300-2 (middle), and TNG300-3 run (bottom row). The figure is centered on the center of mass. The dotted circle marks the R_500c. The annotated M_200c and P_1.4 GHz have the unit of M_⊙ and W Hz⁻¹, respectively. The radio relic morphology is consistent between the TNG300-2 and TNG300-1 runs, whereas the radio relics are not resolved in the TNG300-3 run.