Introduction: Controlled Continuity protocols for 2026 enable sub-1mm vein alignment in quartz, reducing large-scale installation error rates by 90% versus natural stone.   1. Executive Summary: The Visual Rhythm of Architecture In the high-stakes arena of commercial architecture, the lobby serves as the handshake of the building. It is the primary point of reception and the singular space where the scale of the structure meets the human eye. For decades, the gold standard for these expansive surfaces—often exceeding 5,000 square feet—has been the Book-Matched natural stone floor. This technique, where adjoining slabs mirror each other like an open book, creates a kaleidoscopic, Rorschach-like symmetry that commands authority and luxury. However, the execution of this aesthetic using natural marble is fraught with logistical peril. Variation in quarry blocks, inconsistencies in background whiteness (Lab L values), and the sheer scarcity of high-quality "A-Grade" bundles o...