Correction per Λ-iteration averaged between 15 and 40 days for the broad-band and bolometric lightcurves of model 12C. The colours used for the bands are the same as in Fig. 12, and the optical and NIR bands have been marked with circles and triangles, respectively. For the U- and V-bands we also show the curves of geometric convergence for a ratio of successive corrections of 0.58.