Adiabatic entropy from sets of 3D simulations with varied chemical compositions (similar to the lowermost panel in Figure 2) presented along projections in the ﹩\mathrm{log}g﹩–﹩\mathrm{log}{T}_{{\rm{eff}}}﹩ plane. Each metallicity requires different coefficients for A and B, which correspond to different adiabatic contours in the ﹩\mathrm{log}g﹩–﹩\mathrm{log}{T}_{{\rm{eff}}}﹩ plane.