Validation of the intrinsic alignment implementation in DLL simulations compared to theoretical Halofit prediction. Upper panel: and contributions from theoretical predictions (dashed line) and DLL simulations. Lower panel: fractional difference between the theoretical and simulated and contributes. We can see that we measure a reduced power spectrum at low ℓ compared to the theoretical predictions. This can be explained by the small volume of our simulation and the related low number of large-scale modes. The power spectra and ratios are means over 100 independent map realizations and the shaded regions represent the standard deviation from 100 realizations.