When designing a space—whether at the scale of interiors, architecture, or infrastructure—materiality is a central concern. Beyond aesthetics, materials determine how a project functions, ages, and endures. Some architects—such as Wang Shu and Kengo Kuma—have built their practices on a deep sensitivity to the potential and limits of materials. But even in the most pragmatic sense, the question arises: What lasts? What doesn't? And how do materials change over time? Naturally, materials shape atmosphere and appearance—qualities that often matter most to clients. Yet increasingly, the discourse around materiality has shifted from structural substance to surface treatment. When did we start focusing more on "decorating" our spaces by layering one material over another, rather than relying on the inherent beauty and performance of the building fabric itself?