Build Three.js Scroll Worlds Build one detailed real-time world and use native document scroll as its deterministic conductor. Keep the renderer, scene graph, and spatial continuity alive while camera composition, light, fog, animation, copy, and interaction focus move through authored chapters. The mechanism is one persistent Three.js world + one normalized reversible scroll state . If removing either makes the experience collapse into stacked sections, this skill applies. The exact Kage demo proves the quality bar; it is staging, not a mandatory subject or layout. Use its detailed anatomy o…