From the view of SVD, each 3D porosity image is constructed from a linear combination of the eigencages (see eqn. 8). We show here that, remarkably, even the six eigencages in Fig. can be enough to visually reproduce the structure of the cavity in a porous organic cage molecule. As an example, in Fig. we show the approximated reconstruction of the 3D porosity image of porous organic cage molecule B25 using different numbers of eigencages.