Asset licences

Source file: game/assets/audio/LICENSES.md

Audio licences and sources

Every file under game/assets/audio/ is listed below with its source and licence. Nothing here is CC-BY-NC or of unknown licence.

1. Kenney (CC0 1.0 Universal, public domain)

Downloaded from https://kenney.nl/assets/<pack>. Each file is a verbatim copy of the pack's OGG, renamed to the path shown.

2. Procedural (original, generated by game/tools/make_sfx.py)

Synthesised in numpy from sine partials, filtered noise and envelopes. No samples were used. The project owns these files and they carry no third-party licence. Loops are exact multiples of their length at 48 kHz, so they join without a seam.

• amb/boat_engine_loop.ogg
• amb/cicadas_loop.ogg
• amb/crickets_loop.ogg
• amb/gull_0.ogg
• amb/gull_1.ogg
• amb/gull_2.ogg
• amb/gull_3.ogg
• amb/harbour_clink_0.ogg
• amb/harbour_clink_1.ogg
• amb/harbour_clink_2.ogg
• amb/harbour_water_loop.ogg
• amb/outboard_loop.ogg
• amb/street_chatter_loop.ogg
• amb/surf_loop.ogg
• amb/traffic_hum_loop.ogg
• sfx/bell/church_0.ogg
• sfx/bell/church_1.ogg
• sfx/bicycle/bell_0.ogg
• sfx/bicycle/bell_1.ogg
• sfx/bicycle/chain_loop.ogg
• sfx/gun/pistol_0.ogg, sfx/gun/pistol_1.ogg, sfx/gun/shotgun_0.ogg, sfx/gun/shotgun_1.ogg, sfx/gun/rifle_0.ogg, sfx/gun/rifle_1.ogg (make_guns_and_sirens)
• sfx/police/siren_loop.ogg (make_guns_and_sirens)
• sfx/bus/air_brake_0.ogg
• sfx/bus/diesel_loop.ogg
• sfx/bus/door_chime_0.ogg
• sfx/car/engine_diesel_loop.ogg
• sfx/car/engine_small_loop.ogg
• sfx/car/horn_double_0.ogg
• sfx/car/horn_long_0.ogg
• sfx/car/horn_short_0.ogg
• sfx/car/horn_short_1.ogg
• sfx/car/skid_0.ogg
• sfx/car/skid_1.ogg
• sfx/cash/register_0.ogg
• sfx/cash/register_1.ogg
• sfx/crowd/cheer_0.ogg
• sfx/crowd/cheer_1.ogg
• sfx/crowd/murmur_loop.ogg
• sfx/footstep/asphalt_0.ogg
• sfx/footstep/asphalt_1.ogg
• sfx/footstep/asphalt_2.ogg
• sfx/footstep/asphalt_3.ogg
• sfx/footstep/sand_0.ogg
• sfx/footstep/sand_1.ogg
• sfx/footstep/sand_2.ogg
• sfx/footstep/sand_3.ogg
• sfx/grunt/effort_0.ogg
• sfx/grunt/effort_1.ogg
• sfx/grunt/effort_2.ogg
• sfx/grunt/effort_3.ogg
• sfx/grunt/effort_f_0.ogg
• sfx/grunt/effort_f_1.ogg
• sfx/grunt/effort_f_2.ogg
• sfx/grunt/pain_0.ogg
• sfx/grunt/pain_1.ogg
• sfx/grunt/pain_2.ogg
• sfx/petard/burst_0.ogg
• sfx/petard/burst_1.ogg
• sfx/petard/petard_0.ogg
• sfx/petard/petard_1.ogg
• sfx/petard/petard_2.ogg
• sfx/petard/petard_3.ogg
• sfx/petard/petard_4.ogg
• sfx/petard/rocket_0.ogg
• sfx/petard/rocket_1.ogg
• sfx/punch/swing_0.ogg
• sfx/punch/swing_1.ogg
• sfx/punch/swing_2.ogg
• sfx/scooter/two_stroke_loop.ogg
• ui/phone_notify_0.ogg
• ui/phone_notify_1.ogg

Festa band march (original, synthesised in Python with the standard wave module)

• sfx/band/march_0.wav: a 4 s, 120 BPM bass-and-snare march loop (two bars) for the festa band. No samples, no third-party sounds. Used as band_march in data/audio.json. Original work, free to use.

3. Voice lines (generated, game/tools/bake_voices.py)

Rendered with Kokoro-82M through the local server in game/ai/tts, using only the Kokoro preset voices listed in game/ai/tts/voices/voices.json. No real person's voice is cloned. The Kokoro-82M licence is not recorded in this repository. Check the model card before any public release and add the licence here.

0 files, indexed in voice/manifest.json.

3b. Mumble syllables (generated, game/tools/bake_mumbles.py)

mumble/male/*.ogg and mumble/female/*.ogg (60 clips, 0.15 to 0.32 s, about 260 KB in all): single nonsense syllables spoken offline by Piper en_US-libritts_r-medium speakers 7, 272 and 201 (male) and 255, 241 and 101 (female). These are non-cast voices from fallback_pools in game/data/piper_voices.json, and none of them is a ref_* clone reference. Voice licence: LibriTTS-R, CC BY 4.0 (openslr.org/141). Attribution: "Voices: Piper (rhasspy) trained on LibriTTS-R (CC BY 4.0)".

4. Music

None shipped. The music states in game/data/audio.json have no files, and their expected filenames are documented in game/docs/AUDIO.md.

Source file: game/assets/third_party/LICENSES.md

Third-party visual assets: sources and licences

All textures and HDRIs below come from Poly Haven (https://polyhaven.com), whose assets are released under CC0 1.0 Universal (https://creativecommons.org/publicdomain/zero/1.0/). Attribution is not required; the author credits are listed for reference.

Fonts come from Google Fonts (https://fonts.google.com), taken from the google/fonts GitHub repository (https://github.com/google/fonts, path ofl/<family>/). They are licensed under the SIL Open Font License 1.1; the licence text ships in each font folder as OFL.txt.

Textures (textures/<id>/)

Each texture folder holds _diff (albedo), _nor_gl (normal map, OpenGL convention), _rough (roughness) and _ao (ambient occlusion) JPGs.

Downloaded from the jpg entries of https://api.polyhaven.com/files/<id>, e.g. https://dl.polyhaven.org/file/ph-assets/Textures/jpg/2k/sandstone_blocks_05/sandstone_blocks_05_diff_2k.jpg.

HDRIs (hdri/)

Equirectangular Radiance .hdr, 2K.

Downloaded from the hdri entry of https://api.polyhaven.com/files/<id>.

Fonts (fonts/)

Downloaded from https://raw.githubusercontent.com/google/fonts/main/ofl/<family>/.

Not used

ambientCG was not used. Poly Haven had a suitable match for every requested slot.

Source file: game/assets/LICENSES.md

Third-party assets and tools: sources and licences

3D characters

Derived variants (generated, current)

• Files: assets/characters/variants/*.glb (21 files), built by tools/blender_makehuman.py.
• Bodies and clothing: MakeHuman 1.x system and community assets (CC0), see below, built with MPFB2.
• Animations: Quaternius Universal Animation Library, Standard set (CC0), see below. Retargeted to the MPFB game_engine rig. Wave and Drink are procedural arm offsets on the Idle pose (the UAL has no such clips).
• Licence of the generated files: CC0 (from the sources above). The tool script and the primitive props (hard hat, police cap, delivery box, apron, badge, handbag) are original work.

MakeHuman assets (body, skin, hair, clothes, eyes, eyebrows)

• Project: https://makehumancommunity.org. System assets (targets, skins, rigs, eyes, eyebrows, hair, clothes) are released under CC0 1.0 by the MakeHuman project.
• Source used: makehuman_system_assets_cc0.zip (280 MB) from files.makehumancommunity.org, extracted into the MPFB2 add-on data folder (extensions/user_default/mpfb/data).
• Files used in the variants: skins young/middleage/old_caucasian_male|female, toon01 not used; hair short01-04, bob01-02, long01, ponytail01; clothes male_casualsuit01-06, male_elegantsuit01, male_worksuit01, female_casualsuit01-02, female_elegantsuit01, shoes01-06, fedora01; eyes low-poly; eyebrows eyebrow001.
• Licence: CC0 1.0 (public domain dedication). Attribution is not required.

MPFB2 (MakeHuman Plugin for Blender) v2.0.18

• Project: https://github.com/makehumancommunity/mpfb2, source zip from GitHub.
• Licence: GPL-3.0-or-later (the add-on code). It is used only as a build tool in Blender. It is not shipped in the game, and the GLB outputs are not derived from its code.

Quaternius Universal Animation Library (Standard), CC0

• Author: Quaternius (https://quaternius.com).
• Source used: the GitHub mirror J-Ponzo/gltf-universal-animation-library (its README says it is the itch.io free version of 2025-06-10). The itch.io download was not used because its purchase flow did not allow a free download.
• Licence: CC0 1.0 (text in the mirror's LICENSE, copied to assets/characters/_downloads/ual/LICENSE).
• File used: AnimationLibrary_Godot_Standard.gltf and its .bin. Retargeted, not shipped.

KayKit: Adventurers Character Pack 1.0 (archived)

• Author: Kay Lousberg (https://www.kaylousberg.com), KayKit. CC0 1.0 Universal.
• The earlier base humans (Barbarian, Knight, Mage, Rogue, Rogue_Hooded) are no longer used. They are archived in assets/characters/_old_kaykit/ with a .gdignore, and the superseded script is archived there as blender_variants_kaykit.py.

Textures (ambientCG, CC0)

Rust007 (1K-JPG)

• Author and source: ambientCG (https://ambientcg.com/a/Rust007). Licence CC0 1.0 Universal, stated on the asset page.
• Files kept: assets/external/ambientcg/Rust007/ (Color, Roughness, NormalGL, AmbientOcclusion JPGs). The zip's .blend, .usdc and .mtlx files were not kept.
• Used for: the rust decal patches on the Maruti 800 (colour, normal and AO/roughness ORM) and the "rust" vehicle surface (triplanar PBR), both in scripts/world/vehicles/VehicleModels.gd; its normal map also gives the city lamp posts a faint pitting (scripts/world/city/CityStreet.gd).

Metal032 and Wood049 (1K-JPG)

• Author and source: ambientCG (https://ambientcg.com/a/Metal032, https://ambientcg.com/a/Wood049). Licence CC0 1.0 Universal, stated on each asset page.
• Files kept: assets/external/ambientcg/Metal032/ and Wood049/ (Color, Roughness, NormalGL JPGs).
• Used for: the bus shelter steel frame and pole (Metal032) and the bench slats (Wood049) in scripts/world/city/BusShelter.gd. The shelter's timetable and route-sign atlas is drawn by tools/make_bus_shelter_atlas.py (procedural, parody operator name).

Procedural city assets (no third-party content)

• Parish churches (scripts/world/city/CityChurch.gd), festa pennants and pavaljuni (CityFesta.gd), luzzu boats with the procedural Eye of Osiris texture (CityLuzzu.gd), and the facade detail in CityBuilder.gd are generated in code. They reuse the Poly Haven CC0 textures already listed in assets/third_party/ (sandstone_blocks_05, distressed_painted_planks, painted_plaster_wall, coast_land_rocks_01). No fal or other paid generation was used.

Text-to-speech (offline)

Piper (TTS engine)

• Project: https://github.com/rhasspy/piper, Copyright (c) 2022 Michael Hansen, MIT licence (LICENSE.md in the repo).
• Installed in ai/piper/venv from PyPI as piper-tts 1.8.0. The old macOS release tarball (piper_macos_aarch64.tar.gz, 2023.11.14-2) was incomplete (its libraries were missing), so it was not used.
• The piper-tts package licence was not separately checked. It is expected to be MIT like the upstream project; confirm before shipping.

Voice: en_GB-alan-medium

• Source: https://huggingface.co/rhasspy/piper-voices (en/en_GB/alan/medium), files en_GB-alan-medium.onnx and .onnx.json in ai/piper/voices/.
• Model card: fine-tuned from the US English lessac voice. Dataset is the Mycroft mimic3-voices voice apope_low (https://github.com/MycroftAI/mimic3-voices). The model card says "License: See URL".
• The mimic3-voices repository is listed on GitHub as CC BY-SA 4.0. That is a ShareAlike licence, and it may apply to this voice model. Review before shipping a commercial build. Consider swapping this voice for one with a clear permissive licence.

Voice: en_GB-jenny_dioco-medium

• Source: https://huggingface.co/rhasspy/piper-voices (en/en_GB/jenny_dioco/medium), files en_GB-jenny_dioco-medium.onnx and .onnx.json in ai/piper/voices/.
• Dataset: Jenny (Dioco), https://github.com/dioco-group/jenny-tts-dataset. Licence per its README: commercial use permitted. Attribution is required in software that generates audio from user action: refer to the voice as "Jenny" and, where practical, "Jenny (Dioco)". Attribution is not required for distributed clips.

speak.sh

• ai/piper/speak.sh "<text>" <alan|jenny|path.onnx> <out.wav> (tested: produces 22.05 kHz mono WAV for both voices).

Tools

Blender 5.2 LTS (used in background mode)

• Used to run tools/blender_makehuman.py. Blender itself is GPL and is not distributed with the project.

Godot 4.7.2

• Used for the headless import and the tools/test_human.gd test.

Assets that were considered and not used

• Kenney "Animated Characters 3" (CC0, https://kenney.nl) was considered. It has only 3 animations (Idle, Jump pose, Running), so it was not added.

Source file: game/ai/piper/voices/LICENSES.md

Piper voice licences

All models come from https://huggingface.co/rhasspy/piper-voices (the .onnx, .onnx.json and MODEL_CARD files; each card is saved next to its model as <stem>.MODEL_CARD). The Piper runtime (piper-tts 1.8.0 in venv/) is GPL-3.0-or-later and bundles espeak-ng data (GPL-3.0). It runs as a separate process over HTTP and is not linked into the game; keep it that way, and ship its source and licence if the server is ever bundled. The licence below is that of the *training dataset*, as stated in the model card, and it governs the voice.

Non-commercial flags: none of the downloaded models are NC. Two models were considered and deliberately *not* downloaded because their cards are non-commercial: en_US-l2arctic-medium (CC BY-NC 4.0) and en_GB-semaine-medium (CC BY-NC-SA 4.0). en_US-ryan-medium (CC BY-NC-SA 4.0) was also skipped. alan and jenny_dioco are not used by data/piper_voices.json, so the cast does not depend on their unverified licences.

Attribution for credits: "Voices: Piper (rhasspy) trained on LibriTTS-R (CC BY 4.0), CSTR VCTK Corpus (CC BY 4.0), the Google crowdsourced UK/Ireland English dataset (openslr 83, CC BY-SA 4.0) and LibriVox (public domain)." reza_ibrahim is CC0 (no attribution needed; credit: datasets by RezaHedayatfar and IbrahimWalk, voice trained by Ali Mahmoudi).

Downloaded 2026-11-03: 282.3 MB in total (four models), plus en_US-reza_ibrahim-medium (63.5 MB, sha256 99f0c314...15cd3c, matches the HF LFS oid) the same day: 345.8 MB. Not cast (see docs/handover/piper_voices.md).