Mathematically, Fig. shows the approximant given by eqn. 8 with ν = 1, 2, ..., 9. Expressing B25 in terms of the first two eigencages is insufficient to capture its shape; for ν = 4, the cavity and windows of B25 are captured to some extent. Only until we reach ν = 6 does the outer-contour of the reconstructed 3D void space image of B25 well-approximate the shape of the molecule. The reconstructed B25 3D porosity image with ν = 9 is approaching visual indistinguishably from the exact 3D void space image in Fig. . This shows that e.g. a ν = 9-dimensional latent representation of B25 contains sufficient information to visually reproduce the shape of its cavity.