Three.js on your homepage and still passing Core Web Vitals

Conventional wisdom says heavy visuals kill performance. That's true — if you treat them as requirements instead of enhancements. Our approach flips the priority: server-render all content first so LCP is driven by text and layout, not WebGL. Load the 3D canvas asynchronously inside a client-only island. Detect device capability at runtime and serve three tiers: full particle field on powerful desktops, a simplified scene on mid-range hardware, and a CSS-only fallback on everything else. The result on our own flagship site: under 2 seconds to meaningful paint on mobile, with a full Three.js Signal Field running on desktop. The principle behind it is straightforward — the 3D layer never touches the critical rendering path.