Since IGMH, like NCI and IRI, relies on the actual electron density, it can be too computationally expensive for systems with a very large number of atoms. On the other hand, the image quality of IGM, which is much less computationally demanding, is not ideal. This challenge led us to develop a method that balances the computational efficiency of IGM with an image quality similar to that of IGMH. The recently proposed modified IGM (mIGM) method achieves this goal ideally. The concept behind mIGM is straightforward: it replaces the actual electron density used in IGMH with promolecular density. As a result, the relationship between mIGM and IGMH mirrors the relationship between NCI pro and NCI. The computational time for mIGM is comparable to that of IGM, and both methods only require the file containing atomic coordinates as input. It has been found that, at least for studying weak interactions, the image quality of mIGM is very close to that of IGMH and significantly better than IGM. For details, please refer to the comparisons and examples provided in Ref. . Therefore, when investigating weak interactions between fragments and when IGMH analysis is impractical due to high computational costs, mIGM is an excellent alternative.