# BRIEFING — 2026-10-04T12:19:00Z

## Mission
Investigate texture packing, rendering, and asset processing pipeline tools in FreeExile for PoT packing, Sobel normal maps, dilation padding, ASTC 4x4, and directory/naming conventions.

## 🔒 My Identity
- Archetype: explorer
- Roles: investigation, synthesis
- Working directory: c:\Projects\FreeExile\.agents\teamwork\explorer_survey_3
- Original parent: 34037784-62e1-41f8-bfe6-912696fdec14
- Milestone: Asset Pipeline & Texture Processing Survey

## 🔒 Key Constraints
- Read-only investigation — do NOT implement or modify project code
- Output comprehensive report to analysis.md and handoff.md
- Use send_message to notify parent upon completion

## Current Parent
- Conversation ID: 34037784-62e1-41f8-bfe6-912696fdec14
- Updated: 2026-10-04T12:19:00Z

## Investigation State
- **Explored paths**:
  - `tools/asset_pipeline/` (`animation_pipeline.py`, `texture_compressor.py`, `lod_generator.py`, `pbr_texture_synthesizer.py`, `savage_vfx_factory.py`, `produce_all_missing_skills_vfx.py`, `m4_normal_utils.py`, `clean_sprite_transparency.py`, `mipmap_utils.py`, `design_pipeline_manager.py`)
  - `client/cocos/assets/scripts/animation/SpriteAtlasRenderer.ts`
  - `client/cocos/assets/resources/shaders/sprite_pbr.effect`
  - `client/assets/shaders/SpritePBRNormal.metal`
  - `server/world/martial_catalog.py`, `monster_archetype_catalog.py`, `weapon_types.py`
  - `docs/standards/ANIMATION_AND_VFX_PIPELINE_STANDARDS.md`, `RENDERING_OPTIMIZATION_TECH_REPORT.md`
  - `tests/unit/test_asset_pipeline_tools.py`, `tests/e2e/test_asset_campaign_and_pipeline_e2e.py`
- **Key findings**:
  - PoT packing: Character atlases export at 1280x960 (non-PoT); must upgrade to 2048x2048 PoT.
  - Sobel normal maps: Blue channel mean must be > 128.0; found BGR swap bug in `produce_all_missing_skills_vfx.py` where OpenCV stacked norm_x in channel 0 (Blue), failing `test_t4_client_assets_normal_map_blue_channel`.
  - Dilation padding: Bilinear filtering causes dark fringe on borders; 8-iteration morphological `cv2.dilate` extends RGB in ~90ms while preserving A=0.
  - ASTC 4x4: Specified 16-byte .astc header, 8.0 bpp footprint (75% VRAM savings), Metal pixel formats.
  - Directory structure: Mapped 12 active skills, 5 support sigils, 10 monster genus, and 6 character classes with weapon pairs into unified Cocos resources.
- **Unexplored areas**: None for this survey scope.

## Key Decisions Made
- Completed survey report in `analysis.md` and 5-component report in `handoff.md`.

## Artifact Index
- DISPATCH.md — Dispatch log
- BRIEFING.md — Situational awareness index
- analysis.md — Full technical survey report
- handoff.md — 5-component handoff report