type material refinement stone walls only scene keep exact image no geometry or lighting changes objective increase real depth perception in masonry by introducing physical relief stone walls convert flat looking masonry into volumetric surface each stone must appear slightly protruded relief apply strong surface relief displacement bump stones must not lie on a single plane create subtle variation in depth between stones joints joints must be recessed darker and deeper than stone faces clearly separating each piece visual effect stones must feel stacked layered casting micro shadows avoid flat printed texture appearance control keep same stone size same layout same color modify only depth relief joint shadowing avoid no geometry changes no new pattern no color changes no global contrast increase
