3D distributions of mass fraction ratio [C_Fe∕C_Ti] (upper 2 rows) and log of abundance ratio, (lower 2 rows), for different viewing angles (from left to right) for model W15-2-cw-IIb-HD+dec at the age of Cas A. The results for both shocked and unshocked ejecta are shown. The two semi-transparent quasi-spherical gray isosurfaces indicate the forward (outermost surface) and reverse (inner surface) shocks. The ratios are calculated in cells with density of Fe and Ti greater than 5% of the maximum density of the respective species. See online Movie 4 for an animation of these data; a navigable 3D graphic of the abundance ratio, , in log scale, at the age of Cas A is available at https://skfb.ly/6XnFJ.