# Real Oulu building models

## VirtualOulu runtime exports

The textured FBX models and their original photographic textures in `virtualoulu/`
are **VirtualOulu**, coordinated by the **Center for Ubiquitous Computing,
University of Oulu**. The official project credits **eVocons, LudoCraft, CubiCasa,
VALO Company and the University of Oulu** for modeling the city blocks and campus.

- Official project and licensing statement: https://ubicomp.oulu.fi/infrastructure-virtualoulu
- Runtime source repository: https://github.com/Oulu-UCC/3D_City_fbx
- Runtime license: **Creative Commons Attribution 4.0 International**,
  https://creativecommons.org/licenses/by/4.0/

Runtime exports were downloaded on November 6, 2026. Adaptations made for Oulu Twin:
textures downsampled to a maximum of 1536 pixels and converted to optimized JPEG
or alpha-preserving PNG; obsolete FBM image references repaired against the
original material/texture names; imported centimeter coordinates converted to
meters, Z-up models converted to Y-up, and individual assets approximately
registered against current OpenStreetMap footprints. Source meshes and UVs are
preserved. These are manually modeled historic VirtualOulu assets, not current
photogrammetry and not a claim of centimeter-accurate placement or current facade condition.

Imported assets include Oulu Market Hall and adjacent buildings, the waterfront
wooden warehouses, Oulu City Library, Oulu Theatre, Radisson Blu, and selected
Kirkkokatu street buildings where complete runtime files remain available.

The public playable site does not restrict copying or adaptation of these assets
under their license. Their inclusion does not imply endorsement by the creators.

## Oulu Cathedral architectural reconstruction

`src/game/city/cathedral-model.js` is **original Oulu Twin geometry**, not a downloaded
VirtualOulu asset, scan or photogrammetric mesh. No usable open runtime Cathedral
model was found in the referenced catalog. It follows the recognizable exterior
composition (ochre cruciform church, white pilasters, copper-green central dome,
clock tower, dark belfry roof and gilded cross) and is placed on OSM way 28849152.
Detailed dimensions and decorative placement are approximate.

Architectural reference: UKI Arkkitehdit's renovation description and exterior
references, https://ukiark.fi/en/projects/oulu-cathedral/ . Historical exterior
reference photos were inspected via Wikimedia Commons' Oulu Cathedral category,
https://commons.wikimedia.org/wiki/Category:Oulu_Cathedral . Those photographs
are not bundled or used as texture assets. The reconstructed model is separate
from the CC BY VirtualOulu assets.

## Geographic data

OpenStreetMap footprints remain © OpenStreetMap contributors, ODbL 1.0.
See `/data/NOTICE.md`. Original Oulu Twin artwork and code are separate from both
the ODbL geographic database and the CC BY VirtualOulu models.