Average [O/Fe] abundances as a function of LTE [Fe/H] for 8018 RAVE stars. The blue dots show 1D-LTE abundances (dashed blue line) and 1D-NLTE abundances (solid blue line). The orange crosses show ⟨3D⟩ LTE abundances (dashed orange line) and ⟨3D⟩ NLTE (solid orange line). We also show a kernel density distribution of the 1D-LTE and ⟨3D⟩-NLTE [O/Fe] abundances in the top-right corner. An average trend computed using the 1D-LTE data for stars in the solar neighbourhood from Brewer et al. (2016) is shown in green crosses.