This fully procedural marble material is a premium architectural shader designed to replicate the deep, high-contrast aesthetic of Spanish black marble, featuring sharp, lightning-like white calcite veins that cut through a dense, opaque base. This material utilizes a specialized dual-noise engine and coordinate stretching to eliminate all tiling artifacts, ensuring that every slab or floor tile receives a unique, non-repeating pattern. Engineered for professional visualization, the shader includes an organized interface to toggle between four distinct geological variants—Classico, Minimal, Galaxia, and Fossil—and offers granular control over vein density, jaggedness, and surface polish. By combining a high-gloss dual-layer coating system with precise bump mapping, the material captures realistic specular highlights and physical mineral depth, making it an ideal asset for luxury kitchen islands, bathroom claddings, and high-end interior environments.