Comparison of internal extinction derived from Balmer decrements and SED fitting. The x-axis corresponds to the r-band attenuation for the α.btfr galaxies implied by their Balmer decrements (Eq. (A.2)). The y-axis corresponds to the r-band attenuation inferred during the process of SED fitting used to calculate (refer to method i in Sect. 3.4). The dashed black line is a one-to-one reference line.