I just completed the consteval function to generate the mask table for the fancy filter, and compressed the table by ~50%, as it is a sparsely-populated 2 dimensional matrix. The final implementation matches exactly the manually-generated table (below), though it also adapts based on template arguments for the filter size. Extensive text coverage also. The implementation is simple and performant. Hopefully it does what I think it will do, integrating into the hashmap template and the adding to the point table now.
(edited)