Effect of 3D macroscopic mixing on the bolometric light curve (a) and the density profile as a function of interior mass at the mapping moment of t = 61 213 s (b). The reference model B15-2 (blue) is compared with model B15-2c (green), which is the 1D analog of model B15-2. Model B15-2c is based on the pre-SN model B15, is exploded by a piston, and its chemical composition is identical to that of the averaged 3D model B15-2. For a comparison, the red line shows the bolometric light curve of model B15-2p, which is based on the unmixed pre-SN model B15 and exploded by a piston. Open circles (Catchpole et al. 1987, 1988) and open triangles (Hamuy et al. 1988) are the bolometric data of SN 1987A.