Dependence of red-sequence GLFs on cluster substructures in the B,V,R, and I rest-frame bands (from left to right) for clusters stacked together. Only clusters with detected substructures are considered here (cf. Guennou et al. 2014). Red crosses are red-sequence GLFs normalized to 1 deg². The vertical red lines indicate the 90% completeness limit. Red curves are the best Schechter fits to red-sequence galaxies. The slope of the fit α is given with the number of clusters and the mean redshift of the stack.