Golden light through a thousand small panes: a Victorian iron-and-glass conservatory world, from the soaring Palm Court down to the coal-warmed boiler cellar that keeps it alive. A studio-style seven-sheet concept pack — authored, audited and probe-built end to end by AI agents — that shipped only after the pavilion itself was modelled from its elevation sheet.
7 sheets · 7 generations, 0 regenerations · probe-built in 3 rounds with scan PBR + HDRI light
The elevation sheet is the modelling contract this pack is audited against — four consistent views pinned by structure clauses ("an arched vault, NOT a dome") in the generation prompt. Beside it, the buildability probe: the same pavilion authored headless in Blender and lit by an HDRI sky.
One committed palette — sage iron, glass, buff stone, terracotta, palm greens, cream trim, with copper reserved for the cellar — across every sheet. The three zones are one building experienced three ways: over, along, and beneath the glass.
Seven props at one scale, each generated as a fully separate object, and an eight-swatch material board — every entry named in the pack's element inventory, the written canon production builds from.
Every pack in this lab ships only after an asset is actually modelled from its sheets. The pavilion was authored in three audit rounds — structure first, then framing and material fixes caught by comparing renders against the elevations. The glTF turntable below is the shipped artifact, not an illustration.
| Measurement | Value | Conditions |
|---|---|---|
| Sheet generations | 7 total, 0 regenerations | first zero-regen pack; regen trend across packs 5 → 5 → 1 → 0 |
| Coherence audit | 1 round + confirming pass, clean | subject identity, proportions ≤10%, one palette, all elements nameable |
| Probe authoring rounds | 3 | each round render-audited against the elevation sheet |
| Scan-library materials | 2 sets (cobblestone, ground) at 1K | vendored CC0 (ambientCG), kit.pbr_mat, tile ×2.5 |
| HDRI beauty render | 1200 × 800, EEVEE | day partly-cloudy 1K HDRI, rotation 210° |
| High→low bake exercise | 512 px, 24 stones → 1 slab | baked base colour came out ~4× dark — slab pulled from the shipped asset, flagged KIT-GAP for the platform |
| Shipped pavilion glb | 12.9 MB | packed scan textures + faceted glass + palms; un-optimised probe artifact |
Plinth and forecourt wear vendored CC0 photo-scanned sets — colour, normal, roughness, AO — loaded with kit.pbr_mat.
The beauty shot is lit entirely by a rotating day-sky HDRI — no studio rig; the sky in the glass is the light source.
A jittered-stone high-poly baked to one slab exercised the bake-down path and caught a real albedo defect — reported, not shipped.
Gable arches, roof ribs, fan spokes and the ridge beam are swept tubes following the barrel profile.
The semicircular gable panes are cut discs; the door arch is a boolean-trimmed lunette.
Panes carry real transmission + alpha so the interior palms read through the glass, in HDRI and turntable alike.