The gravitational lensing effect provides various ways to study the mass environment of galaxies. We consider two semi-analytic galaxy formation models based on the Millennium Run N-body simulation and generate mock lensing observations for the two models, and then employ Fast Fourier Transform methods to
compute second- and third-order aperture statistics in the simulated fields for various galaxy samples.
We find that both models predict qualitatively similar lensing aperture signals, but there are large quantitative differences.