Radial variation of the dust attenuation in the Hα line derived using the Balmer decrement (upper panels), of the [N II] contamination (central panels), and their combined effect (lower panels; the Y-axis give the multiplicative factor which should be used to correct luminosities) for the three galaxies of the MUSE/PHANGS sample in common, NGC 4254, NGC 4321, and NGC 4535. The red dashed line shows the values derived using integrated quantities and used in this work, the black solid line the linear best fit to the data.