The differences between synthetic planetary transit light curve as a function of stellar atmospheric extension. Left: average differences between synthetic planetary transit light curves computed using model stellar atmosphere CLIV and best-fit quadratric limb-darkening laws as a function of atmospheric extension for the TESS band (top) and K band (bottom). Right: same as the left panels, but featuring the RMS difference of the light curves. Points denoted by black circles are for model stellar atmospheres with T_eff ≤ 3700 K. Given the model parameters, there are twenty chains for the atmospheric extension due to the combination of four values of gravity and five values of mass.