Comparison of observed 3D-HST Hα fluxes (x axis) with Hα fluxes estimated from the fits (y axis). The 4 attenuation recipes are considered: DBPL-free (filled squares), Calzetti-like (filled circles), CF00 (blue empty squares), C00 (green empty circles). The sources detected in Hα with a signal to noise ratio lower than 2 are represented in red with the same symbols as mentioned before. The dashed line is the 1:1 relation. The 1σ uncertainty on both measurements (observation and fit) is reported for only two flexible recipes (DPBL-free and Calzetti-like) to make the plot more clear.