PDF of θ_x and α_x, the angles between the x-projected major axis of, respectively, the central galaxy (left panel), and direction of the filament (right panel) and the x-projected r_gs, at 0.3 < z < 0.8 for differentcolour bins. For massive red central galaxies, the satellites tend to be distributed on the galactic plane. The projected signal is qualitatively comparable to results in 3D. Observational results from Yang et al. (2006) are overplotted for red centrals (red squares) and blue centrals (blue dots). The agreement is good.