Median effective attenuation curves as functions of the disk inclination for a random star-forming galaxy sample extracted between z = 4 and z = 1.5. The galaxy sample has been divided in 9 bins of disk inclination from face-on (0°) to edge-on disks (90°). The color code indicates different disk inclinations. The median trend of the full sample is plotted with the solid gray line. We compare this trend with a set of standard attenuation curves: Calzetti et al. (2000): circles, Reddy et al. (2016): squares and Gordon et al. (2003; SMC): triangles.