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Self-playing organ

A chamber-sized haunted pipe organ in flat low-poly style: a dark-wood console whose keys press themselves to a ghost melody, a pinned barrel turning in the window under the impost, wedge bellows breathing on both flanks and candle sconces swaying on the towers. Built for the Haunted Mansion kit.

Original GLB361 KB Poster

Left rail: colours and the 5 knobs the agent wrote into this model — they rebuild the geometry and go into your download. Right rail: looks for the viewer. Drag to orbit, scroll to zoom.

Triangles: 2,224
Vertices: 6,012
Meshes · materials: 79 · 79
Size (W × H × D): 1.8 m × 2.7 m × 1.1 m
File: GLB · 361 KB
Animation: scene-motion · 8.0s
Style: Low-poly
Collection: Haunted Mansion

Palette · named materials

wood#3d2a1c
pipe#e4ddcd
pale#c9ba9c
soot#1b1b22
leather#81688d
lining#584861
flame#ec9c13
wax#f2ede2
iron#7d828c
moss#55743e

Use it

import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/haunted-mansion-self-playing-organ/27680092a4/model.glb"
);
scene.add(gltf.scene); // metres, +Y up, front faces +Z

const mixer = new THREE.AnimationMixer(gltf.scene);
gltf.animations.forEach((clip) => mixer.clipAction(clip).play());
// in your loop: mixer.update(delta)

How it was made

The brief given to 1DesignTool's “3D object” template:

Self-playing organ for the Haunted Mansion kit. Design it as one clear asset at believable real-world scale for that setting (state the size in metres in meta.notes), with its main parts modelled and named, readable at thumbnail size and from every orbit angle. It moves: author a seamless baked loop (2–12 s) with every pivot exactly at its hinge, axle or swivel, and keep the base still. This is one part of the Haunted Mansion kit (Low-poly style, flat-lowpoly direction): A decaying house that watches back. Use ONLY the kit palette, by name: faded purple #81688d, bone #e4ddcd, moss #55743e, candle amber #ec9c13, faded purple dark #584861, bone dark #c9ba9c, faded purple light #a497aa, bone light #f9f8f5, soot black #1b1b22, warm white #f2ede2, mid grey #7d828c, dark wood #3d2a1c. Every material's `name` must be exactly the palette colour it uses — the GLB carries these names so the kit recolours as one; an unnamed material fails delivery. Kit knob: expose a param `decayLevel` (0–1, default 0.5) for the kit's "Decay level" setting wherever it makes sense on this part, and keep that id.

Agent: Claude Code · Claude Fable 5.1 in 1DesignTool
Generation: 4.59M tokens (93% cached) · ≈ $10.38 at API prices · 5-hour plan +11%, weekly plan +2%
Direction: Low-poly · family abstract-kinetic
three-check PASS · glb-lint PASS

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Named parts · 27

Self-playing organ
Plinth
Lower chest
Keybed
Keys (w01-w14 white, b01-b10 black)
Nameboard
Upper case
Back panel
Chamber lining
Barrel axle
Left tower
Right tower
Impost shelf
Cornice
Gable
Pipe rank (p01-p09)
Pinned barrel
Left bellows
Left bellows leaf (pleat1-3 fan beneath)
Right bellows
Right bellows leaf (pleat1-3 fan beneath)
Left candle
Left flame
Right candle
Right flame
Inlay panels
Moss

Note: Real-world chamber-organ scale: 2.72 m tall, 1.62 m wide at the cornice (1.5 m case, bellows reach ~1.9 m when open), 1.05 m deep; metres, +Y up, origin at bottom centre on y = 0, keyboard faces +Z. Part ids use the short root 'organ' (the kit's plan checker rejects hyphens in ids) and travel in each node's extras.partId. Baked clip 'scene-motion' (8 s, seamless, 35 moving nodes): keys rotate about their rear hinge line to a seeded 16-step melody, the barrel and its pins turn one revolution about the X axle, the two bellows leaves and their three pleats each fan about the bottom hinge pin in alternation (two breaths per loop), the flames sway from the wick base; plinth, chest, towers, pipes, cornice and gable never move. The GLB's static rest pose is the t = 2 s frame of the loop. decayLevel 0-1: 0 removes all moss geometry and all stuck keys; 0.5 (shipped) grows 5 moss clumps, leaves 2 white keys permanently pressed and sags each pipe up to ~3.4° forward/back at its foot; 1.0 gives 10 clumps, 4 stuck keys and up to ~6.9° sag. pipeCount, pipeHeight and caseWidth rebuild the rank, case height and keybed; bellowsStroke sets the breath angle. All 10 materials are flat-shaded, metalness 0, roughness 0.9-1.0, no textures, and named exactly after kit palette colours; the runtime exporter writes one material instance per mesh, so the GLB carries 79 copies of those 10 names (dedupe by name on import if needed). glb-lint reported 0 errors (its verdict string is UNVERIFIED only because no requirements contract was supplied); its 6 warnings are benign: non-indexed primitives are the deliberate flat facets, the nameboard/inlay and moss/inlay overlaps are inset panels and moss growing over them, the 'detached' keys rest on the keybed within the linter's box tolerance, and the 2.72 m height is intended real-world scale.