Glazed ceramic floor / wall tile. A cols × rows grid with thin
grout gaps and a small bevel at each tile edge. The metallic-
roughness map varies across the surface — tiles are glossy, grout
is matte — so IBL specular reflects sharply on the tile body and
diffuses across the grout. Per-tile colour jitter keeps the array
from reading as flat plastic; per-pixel speckle adds a fine glaze
imperfection. Non-metal.
Glazed ceramic floor / wall tile. A
cols × rowsgrid with thin grout gaps and a small bevel at each tile edge. The metallic- roughness map varies across the surface — tiles are glossy, grout is matte — so IBL specular reflects sharply on the tile body and diffuses across the grout. Per-tile colour jitter keeps the array from reading as flat plastic; per-pixel speckle adds a fine glaze imperfection. Non-metal.