Create a production-quality seamless square PBR base-color texture for a game/3D material library: weathered charcoal-black shou sugi ban cedar planks, narrow vertical boards, deeply charred alligator grain with subtle silver-gray outdoor weathering and restrained warm brown exposed ridges. Orthographic straight-on surface scan, completely flat even diffuse lighting, no perspective, no objects, no border, no frame, no vignette, no shadows, no highlights, no text. The left edge must tile perfectly with the right edge and the top edge perfectly with the bottom edge. Natural irregularity without obvious repeated motifs. Crisp realistic microdetail suitable for a 2K material map; square 1:1 composition.
