# Chicken Lah HD Assets — Batch A 地面包

- Date: **2026-10-31 Asia/Hong_Kong**
- Pack root: `chicken-lah-hd-assets-2026-10-31/`
- Channels delivered: **BC + H** only
- **N / R / AO: deferred** — eng derive from BC+H (checklist §9 allows BC+H first)
- Seamless: offset + cross-blend (**NO mirror**) + uni edge match; FFT tileable noise for not-mirror on structured paving/concrete
- Style: warm moderately-saturated stylized-realistic Singapore HDB/MRT (Scheme B)
- Total API this batch: **8** (4× generate + 4× edit for T03/T04/T06/T08)

## Inventory

| ID | Name | Cover | Res | Files | Method | API | Seam | Not-mirror | Pass |
|---|---|---|---|---|---|---|---|---|---|
| HD-T01 | 草地底土 | 2×2 m | 2048 | `HD-T01_grass_soil_2m_2048_BC/H.png` + 3×3 | seeded+audit | 0 | ✓ (V=0.0, H=0.0) | ✓ (LR=29.936) | ✓ |
| HD-T02 | 远景草地 | 8×8 m | 1024 | `HD-T02_grass_far_8m_1024_BC/H.png` + 3×3 | seeded+audit | 0 | ✓ (V=2.582, H=1.005) | ✓ (LR=18.647) | ✓ |
| HD-T03 | 步道铺砖 | 2×2 m | 2048 | `HD-T03_paving_2m_2048_BC/H.png` + 3×3 | gen+seamless+fft_noise | 2 | ✓ (V=0.0, H=0.0) | ✓ (LR=12.513) | ✓ |
| HD-T04 | 小方地砖 | 2×2 m | 2048 | `HD-T04_tiles_2m_2048_BC/H.png` + 3×3 | gen+seamless+fft_noise | 2 | ✓ (V=0.0, H=0.0) | ✓ (LR=15.548) | ✓ |
| HD-T06 | 清水混凝土 | 2×2 m | 1024 | `HD-T06_concrete_2m_1024_BC/H.png` + 3×3 | gen+seamless+fft_noise | 2 | ✓ (V=0.0, H=0.0) | ✓ (LR=18.351) | ✓ |
| HD-T08 | 沥青 | 4×4 m | 1024 | `HD-T08_asphalt_4m_1024_BC/H.png` + 3×3 | gen+seamless+fft_noise | 2 | ✓ (V=0.0, H=0.0) | ✓ (LR=16.313) | ✓ |

## Color continuity

- HD-T01 mean RGB: [112.7, 99.4, 32.4]
- HD-T02 mean RGB: [112.4, 100.1, 35.4]
- Luma |T01−T02|: **0.65** (warm olive family continuous)

## Notes

- HD-T01 / HD-T02: seeded from hd-batch2 Round 16; audit re-confirmed 2026-10-31 (seam + not-mirror pass). Previews refreshed.
- HD-T03: warm terracotta running-bond brick; mud/weeds in joints.
- HD-T04: 8×8 of 0.25 m tiles (=2 m); warm station-adjacent taupe paving.
- HD-T06: fair-faced concrete pores + formwork joints; warm grey.
- HD-T08: asphalt aggregate + light oil stains; **no road markings**.
- Soft leftovers: structured paving (T04) grid periodicity is inherent — not_mirror satisfied via stationary FFT noise, not by destroying the grid. Eng may still want a `_station` cool-grey T04 variant later. T06 formwork reads softer after flatten+noise; still usable for columns/stairs/under-bridge.

## Audit JSON

`_raw/batch_a_final_audit.json`

## H-fix 2026-10-31 (Asia/Hong_Kong)

- **API = 0** (local Pillow). BC unchanged.
- Removed mistaken `invert=True` on **T06 / T08** height derivation (was corr ≈ −0.98 vs BC luma).
- After: T06 corr **+0.986**, T08 corr **+0.928** (white=high / black=low, aligned with T01–T04).
- T08: darkest ~12% luma (oil stains) blended toward mid-gray on H so oil does not dig deep pits.
- Archived prior H in `_raw/h_pre_fix_2026-10-31/`; report `_raw/h_fix_report.json`.
- GUCCI Batch A review was conditional pass; this is art-side H correction before formal N.