Standard models of the large-scale interstellar emission adopted so far for studies of the Fermi LAT data show some discrepancies with respect to the data, underlining the necessity of more realistic models. The same CR electrons that produce the gamma-ray inverse Compton emission component of the interstellar emission produce also interstellar synchrotron emission observed in radio and microwave. However, present gamma-ray models do not take advantage of results coming from studies of this interstellar synchrotron emission. Accounting for such results, in this work we show how they affect the calculated large-scale inverse-Compton component. It is found that these results significantly affect the spatial models of the inverse-Compton emission.