Measuring the RGB tip in JKC I band in the LMC (left pair of panels) and in the SMC (right pair of panels). The left panels of each pair display the CMD of the considered sample with the selection of the RGB + AGB sub-sample that is later used to construct the LF (stars enclosed within the blue parallel lines). The orange horizontal line marks the position of the RGB tip and the shaded bands show the 1σ and 3σ confidence intervals. The right panels of each pair show the LF of the selected RGB + AGB sub-sample (light-blue histogram) and the best-fit model which we used to estimate I^TRGB.