webgl-liquid-metal

Liquid Metal Skill

Produce a single self-contained index.html that renders a real-time metallic surface full-screen — molten chrome with an iridescent sheen — with a clean typographic overlay on top.

Why this is a powered artifact

OpenDesign detects getContext('webgl2') and renders this file in powered preview — a cross-origin-isolated iframe with allow-same-origin. The full GPU pipeline is available; you do not need to work around the opaque sandbox.

Resource map

webgl-liquid-metal/
├── SKILL.md      ← you're reading this
└── example.html  ← a working domain-warped chrome shader (READ FIRST)

Workflow

Step 0 — Read the reference

Read example.html end to end. Note the shape: a domain-warped fbm height field; a surface normal reconstructed from that field's gradient (finite differences); metallic shading = diffuse chrome ramp + a sharp specular (pow(dot(n,h), 80)) + a fresnel term; and an iridescent cosine palette (0.5 + 0.5*cos(2π(x + phase))) driven by height and fresnel for the thin-film sheen.

Step 1 — Choose the surface

• Molten chrome (default): domain-warped fbm height, hard specular, cool grey base.
• Holographic foil: crank the iridescence, widen the palette phase spread, soften the specular.
• Oil slick: darker base, thinner high-frequency warp, stronger fresnel bands.

Step 2 — Build index.html

• One file, zero external requests. Fullscreen triangle + fragment shader.
• Reconstruct the normal from small height offsets (e ≈ 0.0016); a sharp specular exponent (≥ 60) is what reads as "metal".
• Keep the iridescence tasteful — tie it to fresnel/height so it appears at grazing angles, not everywhere.
• Compile shaders with error logging so a typo fails loudly, not silently black.

Step 3 — Overlay + brand

• Map the accent colors to the active DESIGN.md when one is present; otherwise a restrained metallic palette. The reference tints the hottest specular toward lime #63fe13 as the brand accent.
• Headline ≤ 13ch plus one supporting line. Keep the metal as the hero.

Step 4 — Self-review (P0)

• Renders continuously at ~60fps; the FPS badge updates.
• Reads unmistakably as metal: a sharp, moving specular highlight.
• Iridescence is present but restrained (grazing angles), not a rainbow wash.
• Resizes crisply on window resize (no stretching / blur).
• Degrades to a message (not a blank page) if webgl2 is unavailable.