The prompts

OBSIDIA, a fictional "foundry of impossible materials". One of three showcase sites built to demonstrate what an AI can do with web design, taste and craft. The remit: fundamentally different from the other two, cold and otherworldly, built around a real-time 3D signature moment. Palette: deep obsidian black with a controlled spectral iridescence (teal, ice, violet, magenta, gold) and platinum neutrals, deliberately avoiding the "one acid accent + glow" dark-mode cliche. Type: Bricolage Grotesque display, Hanken Grotesk body, JetBrains Mono for data. The hero is a hand-written WebGL raymarcher; the stills below carry that same material language down the page.

The hero specimen still, shown beside the live-rendered properties.

Extreme macro photograph of a single grown obsidian crystal: black volcanic glass with a wet, glossy oil-slick iridescent thin-film sheen that shifts through teal, ice blue, violet, magenta and warm gold. Sharp conchoidal facets, deep internal reflections, floating centered on a pure black studio background with dramatic rim light. Hyper detailed, tack sharp, photographic, cinematic, no text, no watermark.

Catalog card, a black glass that "remembers being red".

Macro photograph of a dark volcanic glass specimen that looks like black embers remembering red: near-black obsidian with deep crimson and ember-orange iridescence glowing from within the facets, wet glossy surface, sharp edges, floating on pure black studio background, dramatic lighting, hyper detailed, photographic, no text.

Catalog card, obsidian grown around a dark hollow.

Macro photograph of an impossible obsidian ring specimen: black iridescent volcanic glass formed around a perfectly dark hollow center, light bending toward the void, cool teal and violet thin-film sheen on the glossy surface, floating on pure black background, dramatic studio light, hyper detailed, photographic, surreal, no text.

Catalog card, a warmer, pearlescent counterpoint.

Macro photograph of a pearlescent black specimen: obsidian glass with warm nacre and mother-of-pearl iridescence in rose gold, champagne, soft violet and teal, organic rounded folds, wet glossy surface, floating on pure black studio background, dramatic light, hyper detailed, photographic, no text.

Catalog card, angular "crystallised shadow".

Macro photograph of crystallized shadow: angular black salt-like crystals of volcanic glass with faint cold blue and silver iridescent edges, matte-to-glossy transition, sharp geometric facets, floating on pure black studio background, dramatic low-key studio light, hyper detailed, photographic, surreal, no text.

The hero is not a generated asset. Specimen 01 is a single fullscreen triangle running a hand-written GLSL fragment shader that raymarches six smoothly-blended metaballs and shades the hit point with a thin-film iridescence model. No Three.js, no imported mesh. That choice keeps the JavaScript payload tiny (which protects the Lighthouse score) and keeps the whole look in code you can read in /guide.