Same as Fig. 4, but now showing the unclumped models (black) and a counterpart at twice or half the ejecta kinetic energy (blue). Since the ⁵⁶Ni mass is the same for each pair of models, and since each pair of models has been normalized by the same factor (its value is such that the maximum flux of the first model in each pair is unity), the offset in absolute fluxes reflects the difference in the energy absorbed by the ejecta.