Similar to Fig. 12, but for the final results of simulations B1 and B3 (left panel) and B2 and B4 (right panel). As for the WR-RSG interaction, the higher resolution models tend to show more higher order maxima and the 3D models have higher peaks corresponding to the instabilities. The power spectrum of simulation B3 shows a peak at about 0.05 per latitudinal angle, which corresponds to the single large instability.