Add unversioned local map development section

TODO.md

@@ -286,6 +286,76 @@ not delay the release.
       yes, prototype the local MPFB/MakeHuman pipeline outside the repo and commit only the final
       CC0-derived assets with provenance.
 
+## Local map development
+
+Goal: build a local, data-backed map pipeline that can replace or supplement the stylized venue
+geometry with licensed OpenStreetMap footprints, 3D building massing, reference-derived photoreal
+facades and AI-assisted composition. This is an unversioned development track, not a release gate.
+
+### Data, licensing and scope
+
+- [ ] Define the first target block and whether the result replaces, supplements or only informs
+      the current stylized venue specs (`docs/hollywood-boulevard-map.md`,
+      `docs/joke-shop-map.md`).
+- [ ] Audit OpenStreetMap's ODbL attribution/share-alike obligations and decide whether derived
+      geometry ships, stays development-only, or needs a separate data layer.
+- [ ] Choose an offline OSM extract workflow (Overpass/Geofabrik) and pin the extract date and
+      query so the map build is reproducible.
+- [ ] Evaluate licence-compatible 3D building datasets (OSM Buildings, Overture, CityGML/LOD1–2
+      or local authority data); record coverage, accuracy, format and redistribution terms.
+- [ ] Add a provenance sidecar for every map source and derived asset, including source URL,
+      licence, capture/extract date and attribution text.
+
+### Reference imagery
+
+- [ ] Write a reference shot list per block: facade materials, windows, signage, rooflines,
+      street furniture, curb cuts and lighting.
+- [ ] Download and catalogue reference images from Wikimedia Commons, local/own photography or
+      other clearly licensed sources; record author, licence and attribution. Do not use
+      unlicensed Street View or scraped commercial imagery.
+- [ ] Separate development-only references from shipped textures; commit only images with clear
+      redistribution rights and keep the rest under `tmp/` or the ignored reference folders.
+- [ ] Define the photoreal target and a material-derivation workflow (albedo/normal/roughness,
+      AO, weathering) that matches the existing Compatibility renderer.
+
+### Geometry and AI-assisted composing
+
+- [ ] Prototype OSM footprint import into Blender at game scale and orientation, then compare it
+      against the current venue footprint/collider layout.
+- [ ] Import 3D building massing for the target block, clean the topology and assign LOD bands;
+      do not import unbounded city-scale meshes into the runtime.
+- [ ] Build a reusable photoreal facade kit (window bays, cornices, storefronts, awnings, signage)
+      so buildings share materials and stay inside the venue triangle/material budgets.
+- [ ] Add an AI-assisted composition step for palette, facade rhythm and reference boards; record
+      the model, prompt and output, and keep human review as the acceptance gate. AI output must
+      not be treated as licensed map data or shipped without provenance.
+- [ ] Integrate the result behind `WorldBuilder.VENUE_SPECS` with colliders, navigation obstacles,
+      occlusion and the existing day/night materials.
+
+### Gaussian splatting evaluation
+
+- [ ] Evaluate Gaussian splatting as a development tool: local capture, splat reconstruction,
+      Blender import and comparison against the concept/reference set.
+- [ ] Test whether a splat can be used as a photoreal reference or backdrop, and measure file
+      size, render/import cost and Godot Compatibility support.
+- [ ] Check capture permissions, privacy (people, plates, storefronts) and the licence of every
+      capture before using it in the repository.
+- [ ] Record a go/no-go decision in an ADR. Keep splats development-only unless runtime
+      performance, collision/navigation and provenance are all proven.
+
+### QA and exit
+
+- [ ] Compare the data-backed block against the existing screenshots and map documentation; keep
+      the stylized fallback available.
+- [ ] Run the venue triangle/mesh budget, navigation and collider checks, plus day/night capture
+      comparisons.
+- [ ] Update `docs/architecture.md`, the venue map documents, `docs/asset-tooling.md`,
+      `docs/development-status.md` and `CHANGELOG.md` when the pipeline ships or a source is
+      rejected.
+- [ ] Exit: one local block is reconstructed from licensed data with reference-derived photoreal
+      facades, passes performance/navigation/visual QA and has complete provenance; or the
+      pipeline is rejected with the findings recorded.
+
 ## Future 0.x / non-blocking candidates
 
 - [ ] Live 3D body-camera replay.