wgt01

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+# wgt01 Texture Kit & Design — Spec
+
+Date: 2026-07-05 · Branch: `wgt01-tileset-kit` · Status: approved-in-conversation, pending spec review
+
+## Goal
+
+Assemble the material/texture kit for **wgt01** (Westgate Urban Foundation
+tileset): dark gothic ground grammar only — streets, sidewalks, plazas, curbs,
+gutters, raised tiers, ramps, canals, bridges. No buildings (placeables later).
+Palette and material language follow `wgt01/concept-art-1.png` (8 material
+slots) and `wgt01/VIBE.md` (noir dark fantasy, rain-slick, early
+industrial-magical shown only through ground grammar).
+
+## Approach (decided)
+
+**Hybrid curated**, Procampur-first with a small internet pull:
+
+- Base structure from `/home/vicky/Blender/PBR_Procampur` (PBR retexture of
+  stock `tcn01` City set: `_d/_h/_n` maps + `.mtr`, NWN-correct tiling scale).
+  Confirmed too grey-green/warm as-is → every diffuse gets a uniform regrade.
+- Fresh CC0 pulls (ambientCG / Polyhaven or similar) only for slots Procampur
+  lacks: plaza slabs, possibly sidewalk flagstone and bridge arch stone.
+- `pd textures main lib` is fallback only (Roads is mostly modern asphalt; the
+  dark pebble-cobble pattern is a candidate wet-cobble alternate).
+
+Rejected: pure Procampur rename (not dark enough); all-internet (discards
+ready-made NWN conventions, most work).
+
+## Deliverables
+
+1. `wgt01/textures/` — the kit. Per material slot: `wgt01_<slot>_d/_h/_n.tga`
+   (+ `_s` where available) and `wgt01_<slot>.mtr`. All resrefs ≤ 16 chars,
+   `wgt01_` namespace. No originals modified in `/home/vicky/Blender`.
+2. `wgt01/textures/SOURCES.md` — per-file provenance + license notes
+   (Procampur origin filename, or CC0 URL/asset id).
+3. `wgt01/regrade.sh` (or small script) — the single ImageMagick recipe
+   (levels + desaturate + cool tint, ~35% darken) applied to all diffuses so
+   the kit shares one palette. Reproducible; height/normal maps pass through
+   untouched; missing `_s` generated from darkened diffuse.
+4. Materials wired into `wgt01/wgt01.blend` on the tile prototypes
+   (named `MAT_wgt01_<slot>`, image-based, matching KICKOFF material roles).
+
+## Material slots
+
+| # | Slot (concept sheet) | Source | Notes |
+|---|---|---|---|
+| 1 | Wet cobblestone | `tcn01_cobb02` d/h/n | regrade; specular boosted for rain-slick |
+| 2 | Worn stone / patches | `tcn01_cobb05` | regrade; broken/repair variant |
+| 3 | Plaza stone (large slabs) | internet CC0 flagstone/slate | grade to palette |
+| 4 | Curb / sidewalk stone | `tcn01_stone04` or internet flagstone | pick after regrade test |
+| 5 | Retaining wall stone | `tcn01_brick03` + `tcn01_slum01`; `tcn01_watrstn02` waterline overlay near canals | regrade |
+| 6 | Bridge stone | `tcn01_stone04`/`brick03` variant; internet arch stone if needed | regrade |
+| 7 | Dark gutter / drain | `tcn01_grate01`/`grill01` iron + darkened stone channel | near-black, wet; grate01 is DDS-only → convert |
+| 8 | Canal / dark water | authored near-black water diffuse; `.set` `EnvMap` | `tcn01_water01` too green; animation later |
+
+Grime layer (not a slot): `tcn01_splotch*`/`stain*` alpha decals reused as-is.
+
+## Tile grammar (context, unchanged)
+
+Prefix `wgt01`; terrains `cobble` / `plaza` / `canal`; crossers `street` /
+`sidewalk` / `canal_edge`; `Transition=1.5`; raised tier = cobble at corner
+height 1 (not a terrain). Kept minimal per the terrain-pairing cost rule in
+root `AGENTS.md` §2.1. Canal water sits at Z = −0.3 under a non-walkable
+walkmesh.
+
+## Out of scope
+
+Buildings/facades/props; `.set`/`.itp`/`.mdl` emission (twu01 generator kit is
+the reference when we get there); water animation; minimaps; hak packing.
+
+## Verification
+
+- Contact sheet (ImageMagick montage) of all regraded diffuses next to
+  concept-art swatches — visual palette check.
+- Every slot has `_d/_h/_n` + `.mtr`, names ≤ 16 chars, TGA (no stray DDS).
+- `wgt01.blend` opens in Blender 4.0.2 with all `MAT_wgt01_*` images resolving
+  (relative paths into `wgt01/textures/`).
+- `SOURCES.md` covers every shipped file.
+
+## Risks
+
+- Regrade recipe may need per-slot tweaks; keep overrides in the script, not
+  hand-edited images.
+- Internet pulls are network-dependent and need license capture at download
+  time.
+- Procampur's own redistribution license should be checked before the kit
+  ships in a public `.hak`; fine for internal prototyping.