Figure shows that for carbon and nitrogen (and, more broadly, for main-group elements excluding metals), moderate smoothing is achieved with D4S and D4SL. Despite that, it is sufficient to reduce abrupt changes in their C 6 values and correct artifacts arising from such changes. For metal atoms, the large absolute values of the C 6 coefficients lead the D4S scheme to assign small β 2 coefficients, resulting in a significant contribution from the reference values with CN = 0 across all other CN values. In turn, the D4SL scheme is more conservative in this context, as it assigns C 6 coefficients that are closer to the reference values while still effectively smoothing the original D4 plot.