Procedural Low-Poly Buildings (kit, validator, views)
/procedural-lowpoly-building
A GameSkill original: build stylised low-poly buildings in code from a small spec, then prove them: plot and height limits, a triangle budget per tier, closed outward meshes, supported parts, level roofs and side-only taper measured from silhouettes, plus front, side, top and 3/4 renders checked against the geometry.
- License
- MIT
- By
- By GameSkill
Tested by GameSkill
34/34 checks passed on three.js r186 (0.186.1) in Chrome 156 headless (2026-10-28): trigger, a runnable example, a screenshot and self-check, one job per skill, and English + Chinese docs. Trigger checks match prompts against skill descriptions; they are not a live agent run.
Test reportGameSkill's tested copy
Written and tested by GameSkill for gameskill.dev. The ZIP holds the whole skill: SKILL.md and its Chinese version, scripts, a runnable example, tests, the self-check list and our test report.
A GameSkill original, released under MIT. The ZIP keeps LICENSE and CREDITS.md, which lists the workflow inspiration, the CC0 test assets and the third-party libraries with their licenses.
Self-check
- 先只做体块并通过校验，再加窗户 / Masses pass validation before any window is added
- 每个部件都封闭、法线朝外、有支撑 / Every part is closed, faces outward and is supported
- 三角形数不超过本等级预算 / Triangles stay within the tier budget
- 正面和侧面剪影符合意图（例如只在侧面收窄） / Front and side silhouettes match the intent (e.g. narrows on the side only)
- 亲眼看过正、侧、顶、3/4 四张图 / The front, side, top and 3/4 renders were actually looked at
- npm test 和 npm run test:browser 都通过 / npm test and npm run test:browser pass
Install
Tell your AI
Install the skill from https://gameskill.dev/skills/procedural-lowpoly-building/install.md
GameSkill's tested copy
mkdir -p .claude/skills
curl -fsSL https://gameskill.dev/dl/skills/procedural-lowpoly-building.zip -o /tmp/gameskill-procedural-lowpoly-building.zip
unzip -oq /tmp/gameskill-procedural-lowpoly-building.zip -d .claude/skills
rm /tmp/gameskill-procedural-lowpoly-building.zipWhat you get
- src/kit.js: closed, outward-wound box, loft (independent width and depth), gable, pyramid, prism and grouped window grids
- src/buildings.js: three original buildings as specs (tier 1 bakery, tier 2 clock hall, tier 3 harbour tower)
- src/validate.js: plot, height, tier budget, closure, winding, support, level roof, taper intent from orthographic silhouettes
- A turntable and a front / side / top / 3/4 contact sheet where rendered silhouettes must match the measured ones
- 11 Node tests and a 9-check headless Chrome test
Good fit
- City builders, board and tycoon games with code-built buildings
- Fixing buildings that look wrong from the front or side
- Keeping many buildings readable and cheap at small sizes
Not for
- Photogrammetry or AI image-to-3D (see multiview-to-web-3d-asset)
- Realistic architectural visualisation
Try this prompt
Make three low-poly buildings in code for my city builder, check they fit their plots and triangle budgets, and show me front and side views.About this skill
A GameSkill original, written and tested for gameskill.dev under MIT. Three original buildings are written as specs on a tiny ModelKit and checked by a validator; a contact sheet shows each one from the 3/4, front, side and top.
Agent steps
- Write the intent first: plot, height, tier, roof type, which elevation narrows.
- Massing first: masses and roofs only, validate, look at front and side silhouettes.
- Loft, not shrinking boxes, for continuous taper with independent width and depth.
- Group details for the display size; details must touch a mass.
- Spend detail by tier; the budget is a cap, not a target.
- Validate in numbers, then look at all four views.
- Real buildings: front, side and aerial references from the source page; mark inferred forms; keep the identity.
Common errors it fixes
- Stepped tapers from stacked boxes.
- Buildings that look right in 3/4 but wrong from the side.
- Floating details, open meshes and inward faces.
Credits
Workflow ideas from the building-reference-modeling skill in OpenCityMaker by Derek Wang (MIT). Text and code are ours.
Requirements
- Any engine: the kit outputs plain position and index arrays
- Node.js 20+ to run the tests; Chrome for the render check
Topics
FAQ
Based on OpenCityMaker (building-reference-modeling skill, ideas only) by Derek Wang (MIT). Ideas only: GameSkill wrote the code and text; CREDITS.md in the ZIP lists every source.
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