temple_cornice

# sabaean_stone The ochre sandstone the temple of Almaqah is cut from: coursed ashlar joints, grain, weathering that pools in the cuts, sand drifting up from the plain, and a carved South-Arabian glyph band at a chosen altitude. Everything is procedural and measured in world metres, so one material dresses a 34 m terrace and a 0.6 m step at the same stone scale. A terrace states its own band through the instance-data lanes — `lane 0 = vec4(band_center_world_y, band_height, glyph_seed, enabled)` — so the seven terraces carry seven bands off one material. Left at zero, the material's own `band_center` / `band_height` answer, and a `band_height` of 0 means no band. It returns a `PbrSurface`, so the engine lights it and the albedo, normal, roughness and ao debug passes read the real channels.