fyr_rock

Granite for the pyre part's standing stones and fire-ring boulders (Geo.rock meshes spawned by p_fire). Per-pixel grain over the flat facets, weather bands, moss on up-facing surfaces, cool moon key + rim, and the warm flickering fire light. With runes on, a band of carved glyphs circles the stone in Geo.rock's stable azimuth/height uvs — chiseled shadow until rune_glow charges them with ember light (the part drives it from the music). Two materials share this shader: fyr_rock_mat (menhirs, runes on) and fyr_stone_mat (fire ring, runes off).