Key art
Key art — the Brass Diver hauls a salvage crate through a kelp gully
A stylized deep-sea salvage world: the Brass Diver works the kelp gullies and the wreck of the Gilded Gannet from a wooden tender barge on the surface. One committed palette — deep teal, aged brass with verdigris, cream waxed canvas, coral-red accents — across every sheet. A studio-style seven-sheet concept pack, authored, audited and probe-built end to end by AI agents, that shipped only after its hero was actually modelled from the turnaround: the buildability probe below is the proof.
7 sheets · probe-built in 7 audit-driven rounds · fused canvas volumes, curve-tube limbs, brass fittings
The turnaround is the modelling contract this pack is audited against: four views, identical equipment, consistent proportions — aged brass with verdigris patina, open-glass bolted portholes, perforated top vent, leather belt, dark gloves, weighted boots. Beside it, the buildability probe: the same diver authored headless in Blender from this sheet alone.
A pack only ships after an asset has actually been modelled from it. The Brass Diver below was authored headless in Blender from the turnaround sheet alone — fused canvas volumes, curve-tube limbs, brass fittings — across seven audit-driven rounds, then compared back against the sheet for silhouette, proportions and signature details. Verdict: the turnaround under-specified nothing.
| Measurement | Value | Conditions |
|---|---|---|
| Sheet generations | 12 total (7 base + 5 regenerations) | audit round 1 batched all findings into one regeneration round |
| Stubborn sheet | turnaround, canonical at v5 | frame-bleed and unnamed-element drift (gloves, mullions) survived three fixes — solved by a framed-poster border clause + naming every element |
| Coherence audit | 1 full round + confirming pass, clean | subject identity, proportions ≤10%, one palette, all elements nameable |
| Probe authoring rounds | 7 | each round render-compared against the turnaround; round-1 limbs discarded outright — stacked-ball look, rebuilt as swept tubes |
| Probe turntable | 5 angles, headless EEVEE | render_asset.py, ~4–5 min per angle on CPU |
| Shipped diver glb | 4.7 MB | un-optimised probe artifact, procedural materials |
What the pack proved: enumerated per-position prompts fix swatch-count drift on material boards; a framed-poster border clause keeps four-view turnarounds fully inside the frame; and any element left unnamed in a prompt (glove colour, vent pattern) will drift between sheets — the element inventory is the contract that catches it. Full findings feed the platform's concept generation pipeline.
Torso, gloves and boots are voxel-remeshed fusions of primitive stacks — seam-free soft forms, polished with subsurf.
Arms are tapered swept tubes; their open ends are swallowed by oversized brass cuffs — the junction rule this probe earned.
Porthole rims, collar and rivet rings are placed by loop arithmetic — counts and radii straight from the sheet.
Materials authored at ~60% of the concept's sRGB values in linear space, then verified against the sheet on renders.
Every authoring round rendered from five yaws and compared to the turnaround — silhouette, proportions, signature details.
Sub-element disputes (vent pattern, belt hardware) resolved once in the written inventory, not by regeneration churn.