# 📐 L2 Spec — Structured-Light Depth Mismatch-Only Spec
**ID:** `L2-097-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-097`](/artifact/l1/L1-097)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.62 · **Delta tier:** 5
> **⛓ On-chain block:** 41547813
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 480 – 4000 |
| W | px | 640 – 4000 |
| W p | — | 256 – 4096 |
| K patterns | — | 4 – 64 |
| Baseline mm | mm | 30 – 500 |
| Photon count | — | 50 – 10000 |
| Ambient light | — | 0.0 – 100000 |
| Specular fraction | — | 0.0 – 0.5 |
| Occlusion fraction | — | 0.0 – 0.3 |
| Subsurface scattering | — | 0.0 – 0.3 |
| Projector camera pose drift | — | 0.0 – 0.002 |
## 2. Tolerance (ε)
**Type:** `fn`
```
0.2 + 0.8 * log10(ambient_light / 100 + 1) + 5.0 * specular_fraction + 2.0 * subsurface_scattering - 0.1 * log2(K_patterns / 4)
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.62 |
| Delta tier | 5 |
## 4. Fingerprint
`cd35e08e3c74777072a0cfdb8891e08ffda6b7bc22561ff8db71c9a1533450c4`
## 5. On-chain Registration
- **Chain hash:** `0x48f146913db77804aa9562cfac90eacd9bdaadb0d7508856db2b290f120ea788`
- **Chain tx hash:** `0xe6b9e3734ca9228431e0cee2ddc1c8bd4811d19092bb418f06e73302f068872a`
- **Chain block:** `41547813`
---
## File Mapping
This bundle consists of: `L2-097-001.md`, `L2-097-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-097-001.md` | Source of truth — edit this | Human or LLM |
| `L2-097-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-097-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._