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3d Cursor ruleA

3d from darknecrocities/skillbuilder is a Cursor rule: instructions the Cursor agent follows in that repo.

Install it, pinned
mdr add darknecrocities/skillbuilder/.cursor/rules/3d.mdc@git:20261029.1aa6bef

Pins git:20261029.1aa6bef in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 14 of 14 checks passed
Kind
Cursor rule
Repository
darknecrocities/skillbuilder
Path
.cursor/rules/3d.mdc
Versions recorded
1
Latest version
git:20261029.1aa6bef, committed Oct 29, 2026
Size
5,651 bytes
Repository stars
13
License
none declared

Interactive 3D WebGL, Three.js, and React Three Fiber (R3F) engineering skill. Enforces 60fps budgets, PBR materials, Draco compression, and studio lighting.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Interactive 3D WebGL & Three.js Engineering (`/3d`)

> **Philosophy**: *Real-time 3D must be physically grounded and buttery-smooth. Enforce 60fps budgets, Draco compression, PBR physical materials, and strict memory disposal.*

This skill establishes production engineering standards for interactive 3D web applications, real-time product visualizers (e.g., automotive/roadster showcases), Three.js, and React Three Fiber (R3F).

---

## 1. Quick Navigation & Progressive Disclosure

| Resource Type | Document | Description |
| :--- | :--- | :--- |
| **Reference** | [references/threejs-performance-optimization.md](references/threejs-performance-optimization.md) | 60fps/120fps frame budgets, geometry instancing, frustum culling, texture mipmapping. |
| **Reference** | [references/pbr-materials-and-draco.md](references/pbr-materials-and-draco.md) | Physically-based materials, clearcoat setups, Draco glTF compression. |
| **Utility** | [scripts/verify_3d_performance.py](scripts/verify_3d_performance.py) | Audits Three.js source code for DPR clamping, disposal routines, and Draco decoders. |
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add darknecrocities/skillbuilder/.cursor/rules/3d.mdc@sha256:7794ab1a5aec9364

The line at the top of this page pins the label git:20261029.1aa6bef, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_gl67zim73e43oqbx.svg)](https://markdownregistry.com/a/art_gl67zim73e43oqbx)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Oct 29, 2026.

versioncommittedcommitsizeaudit
git:20261029.1aa6bef latest2026-10-29 1aa6bef 5,651 BA view

Audit of the latest version

A  14 of 14 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Size between 200 bytes and 200 KB (5651 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

darknecrocities/skillbuilder · 13 stars · license none declared · pushed 2026-10-29 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_gl67zim73e43oqbx
GET https://markdownregistry.com/api/v1/resolve?ref=darknecrocities/skillbuilder/.cursor/rules/3d.mdc
GET https://markdownregistry.com/api/v1/blob/7794ab1a5aec9364b06010cad6a5a1d53c1ff920f23263d107326f6f962c5784

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: Cursor rules vs AGENTS.md · which agent file does what.

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Every file in darknecrocities/skillbuilder

Other files named 3d

3d SKILL.md skill
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