For denser representations, a space-filling occupancy model can be used. In this type of representation, we take into account the van der Waals radius of each atom and use a pair correlation function to represent its electronic surface in space. This approach assigns voxels near an atom's core a value approaching 1.0, decreasing to 0.0 with increasing distance. In this work, we use the pair correlation function described by Jiménez et al. for the occupancy model: