The effect of different reference solar compositions, A09 (solid gray lines) vs. GS98 (dashed green lines) across metallicity ([Fe/H] = 0.0, −0.5, and −1.0, in the left, middle, and right columns, respectively) and overshooting (no overshoot and core and envelope overshooting included, in the top and bottom rows, respectively) scenarios. Fiducial hot IS strip is overplotted for reference.