sow-module-tilesets/docs/superpowers/specs/2026-07-05-wgt01-texture-kit-gaps.md

wgt01 Texture Kit — Missing Slots (Phase 2) — Spec

Date: 2026-07-05 · Status: material slots shipped 2026-07-05 (fbrick, iron, timber, planks, brass, copper, plastr, slate, glass — see wgt01/textures/SOURCES.md). Remaining: decal tail only (canvas, poster, alchst, soot variant) — deferred until facade/placeable work shows they're needed. Deviations: glass is diffuse-only (no .mtr; alpha/env deferred); slate _h is derived from the diffuse (BC4 source undecodable).

Goal

Extend the shipped wgt01 ground kit (see 2026-07-05-wgt01-texture-kit-design.md, phase 1, merged) with the material slots from the wgt01/concept-art-2.png MATERIAL PALETTE row that the kit does not yet cover. These serve buildings/props/upper structures, so they are needed before any facade or placeable work — not by the ground tiles.

Missing slots

slot	palette name	proposed basename	notes / source leads
red fire brick	BRICK (INDUSTRIAL)	wgt01_fbrick	deep red industrial brick; ambientCG Bricks* CC0, regrade warm-dark (keep red, don't cool-tint it away)
metal (iron)	METAL (IRON)	wgt01_iron	riveted dark plate; ambientCG Metal* CC0; low roughness, near-black
wood (timber)	TIMBER	wgt01_timber	dark structural beam wood; Procampur tcn01_wood* if present, else CC0
wood planks (tarred)	WOOD (TARRED)	wgt01_planks	dock/floor planking, near-black tarred finish
brass	BRASS	wgt01_brass	fittings/trim; small tiling metal, warm highlight
copper (aged)	COPPER (AGED)	wgt01_copper	verdigris green-teal; roofing/pipes
plaster	PLASTER	wgt01_plastr	cracked grey-brown wall plaster
roof slate	ROOF SLATE	wgt01_slate	dark slate shingles
dirty glass	DIRTY GLASS	wgt01_glass	window panes; likely needs alpha/env treatment
rope / canvas	ROPE / CANVAS	wgt01_canvas	awnings, tarps, rigging
paper / posters	PAPER / POSTERS	wgt01_poster	decal-style, 32-bit alpha like the grime decals
alchemical stains	ALCHEMICAL STAINS	wgt01_alchst	alpha decal overlay
grime & soot	GRIME & SOOT	—	partially covered by wgt01_grime1_d; add soot variant if phase-2 work shows it's needed

Priority when planned: fire brick, iron, timber, planks first (user-named, plus structural); brass/copper next (trim); plaster/slate/glass with facade work; canvas/poster/stains as decals last.

Standards (carry over from phase 1, as shipped)

• TGA type 2 uncompressed; 24-bit for _d/_n/_h, 32-bit RGBA for decals.
• Basenames ≤ 16 chars, lowercase, wgt01_ prefix.
• .mtr CRLF: texture0 _d, texture1 _n, texture2 black, texture4 _h.
• All diffuses through wgt01/regrade.sh (defaults MOD=65,55,100 TINT=#232830 TINTPCT=12) with per-slot env overrides recorded in SOURCES.md — except slots whose identity is a hue (fire brick red, copper verdigris, brass): those get a custom grade that darkens without killing the hue; record the exact command.
• Every file gets a SOURCES.md row (origin + license) at creation time.
• New materials wired as MAT_wgt01_<slot> in wgt01.blend via wire_materials.py (which sets use_fake_user).

Out of scope

Building/facade geometry; .set/.hak packing; animated glass/env maps. This spec is inventory + standards only; sizing and sourcing decisions happen when a phase-2 plan is written.