A formliner and master mold are disclosed. The master mold corresponds with the formliner, which includes a plurality of courses, each course having a plurality of pockets, each pocket sized and configured to receive a decorative brick, and a plurality of ridges arranged and disposed to separate the pockets. In the embodiment, the ridge lattice has a first ridge having a dimension that differs from a same dimension of a second ridge or a portion of the first ridge.