R_V estimated for each 5 × 5 pix² bin versus the projected galactocentric offset (gray diamonds) for NGC-1404. The dashed blue lines mark the median R_V, < R_V >, and the short dashed blue lines enclose the 1σ uncertainty of the median. The red dot indicates the estimate and/or inference obtained for the vicinity of the hosted SNe. The average uncertainty of R_V across bins is 0.42, and each bin has a projected length of 23 pc. For other galaxies in the sample, see Appendix D.