What this is
A single vessel form, generated once at load from a smoothed silhouette curve, lathed around its axis and displaced by a small stack of periodic and noise-based bands so the strata are structural, not painted on. Three material studies — raw stone, banded ceramic glaze, worn dark iron — read the same bumps in different light. Changing study crossfades material only; the geometry underneath never moves.
What it costs
One geometry, two coincident meshes so a study can dissolve into the next without touching the mesh itself. Textures are baked once on a canvas at load, matched exactly to the geometry's band phase so colour and bump agree. A generated studio environment (no HDRI file) drives soft reflections; a real key light casts the only shadow. Everything pauses when the tab is hidden and holds a still, resting angle under reduced motion.
Documentary transfer
This is the shape of an object page for something that deserves to be looked at slowly — a single artifact on a plinth, a product with a material story to tell, one piece from an exhibition given the whole screen. The material-study control is the transferable idea: the same object, re-authored by nothing but what it is made of.