I believe that may be the spectral test https://en.wikipedia.org/wiki/Spectral_test https://en.wikipedia.org/wiki/Spectral_test which I mentioned in the explana

I believe that may be the spectral test https://en.wikipedia.org/wiki/Spectral_test https://en.wikipedia.org/wiki/Spectral_test which I mentioned in the explanation when showing the lattices visually