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Spiral stair

A half-turn segment of a stone spiral stair for the Wizard's Tower kit — wedge treads winding around a central newel column, a stepped outer kerb and a faceted brass handrail, with glowing rune stones marking both gates.

Original GLB86 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: 1,780
Vertices: 2,988
Meshes · materials: 19 · 6
Size (W × H × D): 2.1 m × 2.8 m × 1.4 m
File: GLB · 86 KB
Animation: Static
Style: Low-poly
Collection: Wizard's Tower

Palette · named materials

stone grey#6e6f78
cliff slate#55606e
dark stone#3e3f47
brass#b08d3c
rune cyan#5fd3e6
moss green#5f7d4a

Use it

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

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/wizards-tower-spiral-stair/61396d4627/model.glb"
);
scene.add(gltf.scene); // metres, +Y up, front faces +Z

How it was made

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

Spiral stair for the Wizard's Tower 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 is a modular piece that snaps on a 1 m grid: give it a length in whole metres and put the origin at its snapping end, stated in meta.notes. This is one part of the Wizard's Tower kit (Low-poly style, flat-lowpoly direction): A crooked tower on a cliff, full of experiments. Use ONLY the kit palette, by name: midnight blue #1d2448, deep violet #4b2a6b, lavender #8a6fb3, brass #b08d3c, aged gold #8a6a22, candle yellow #f2c94c, flame orange #e8833a, stone grey #6e6f78, dark stone #3e3f47, cliff slate #55606e, parchment #e7d7b1, oak brown #6b4a2f, dark wood #3d2a1c, moss green #5f7d4a, rune cyan #5fd3e6, soot black #1b1b22. 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 `towerHeight` (0–1, default 0.5) for the kit's "Tower height" setting wherever it makes sense on this part, and keep that id.

Agent: Devin · SWE-2 Max in 1DesignTool
Direction: Low-poly · family scenes
three-check PASS · glb-lint PASS

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Named parts · 20

Spiral stair
Newel column
Finial
Steps
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Step 10
Outer kerb
Handrail
Rail posts
Threshold
Rune stones
Moss

Note: Real-world size ≈ 2.1 wide × 2.84 high × 1.05 m deep (default params); footprint snaps on a 2 m × 1 m grid cell. Origin is at the newel column base on the entry (snapping) end — the z = 0 face; the stair rises away from it through a half turn. To continue the climb, stack the next module rotated 180° about the column axis and raised by the segment rise (1.6 + 0.8 × towerHeight metres). towerHeight is the kit's 0–1 storey knob; 'hand' mirrors the winding for the opposite corner; 'rail' hides handrail + posts for against-wall installs; 'moss' sets tuft density. Material names in the GLB are the kit palette colour names for recolouring. glb-lint heuristic warnings are expected: treads embed into the column and the rune stones sit on the kerb ends (intentional joins), and flat shading keeps primitives unindexed.