Red sequence GLFs in the F814W (left) and F606W (right) filters. Top: GLFs centered on the cluster in a 807 kpc radius (yellow), on the cluster WL contours (violet), and on the southeastern filament WL contours (cyan). Bottom: GLFs centered on the cluster in a 1 Mpc radius (violet), and in the optically detected filaments B (cyan) and C (yellow). The different curves are the Schechter fit to the data, and the parameters of the fit are displayed in the same color. In both plots the black curve corresponds to the GLF that we would observe if we were selecting field galaxies and incorrectly assuming that they lie at the cluster redshift. The black vertical line corresponds to the completeness magnitude limit.