Left: comparison of the residual bias from the reference simulations (red points) and a simulation in which the PSF has been rotated by 90 degrees (blue crosses). Right: comparison of the residual bias obtained for a circular Moffat PSF in grey, a modified Moffat with an e₁ = 0.1 ellipticity in blue, and a Moffat PSF with an e₁ = −0.1 ellipticity in red. The indicated fits have been computed from the full |g| < 0.4 range.