# Third-party components

## Terrain3D 1.1.0

Copyright Cory Petkovsek, Roope Palmroos and contributors. MIT license, included in `addons/terrain_3d/LICENSE.txt`.
Source and release: https://github.com/TokisanGames/Terrain3D

Local modification: `src/export_plugin.gd` tolerates an absent editor-selected terrain when constructing its export cache hash. The game generates its terrain at runtime, so `plugin.terrain` can be null during headless export. No runtime Terrain3D binary was modified.

## Ground037

User supplied `D:/Downloads2/Ground037_1K-JPG.zip`. Original by ambientCG, CC0 1.0. Source: https://ambientcg.com/view?id=Ground037 . License: https://docs.ambientcg.com/license/ . Packed/resized derivatives are in `assets/terrain`. No attribution is required by CC0; credit is retained for provenance.

## Fonts

DM Sans and Fraunces from Google Fonts, licensed under SIL Open Font License 1.1. Full notices are in `assets/fonts/DMSans-LICENSE.txt` and `assets/fonts/Fraunces-LICENSE.txt`.

## Godot Engine 4.7.2

MIT license. Engine license and third-party notices accompany native release packages as `GODOT_LICENSE.txt` and `GODOT_COPYRIGHT.txt`. Source: https://github.com/godotengine/godot . The web engine and export templates are unmodified official builds.

## WebSocket server

`ws` 8.22.1, MIT. Its license is installed by `npm ci` in `server/node_modules/ws/LICENSE`. This is a development/standalone relay dependency and is not loaded by the browser or YouTube build.

## Original work

Ridgeline's game scripts, layout, icon, vehicle geometry, route, terrain shape, procedural props, and synthesized surface audio were created for this project. No over the hill game assets or source code are included.

The snow powder albedo was generated for Ridgeline with the built-in imagegen tool, then packed to a 512px mobile texture. Its source and generation prompt are recorded in `tools/texture-source/snow-powder-SOURCE.md`. Tire tread impressions are original shader/code geometry.

The upgraded off-road vehicles and cosmetics were authored in Blender for Ridgeline, using our mesh-generation script and a new 256px detail atlas. The user-provided image and [GGBotNet's PSX Style Cars trailer](https://www.youtube.com/watch?v=pCcSWprESqw) informed the polygon and surface-detail style only. None of that car pack's vehicle designs, mesh files or textures are included.

## Recorded sound effects

Engine: domasx2, "racing car engine sound loops", CC0, https://opengameart.org/content/racing-car-engine-sound-loops . Impact: Brian MacIntosh / BMacZero, "Mechanical Sounds", CC0, https://opengameart.org/content/mechanical-sounds . Original author information is also retained in `assets/audio/SOURCES.md`.

Current engine: qubodup / Iwan Gabovitch, "Car Engine Loop 96kHz, 4s", https://opengameart.org/content/car-engine-loop-96khz-4s , selected license CC BY 3.0. Tire skid: audible-edge / Tom Haigh, loop edit by qubodup, "Car tire squeal skid loop", https://opengameart.org/content/car-tire-squeal-skid-loop , CC BY 3.0. License: https://creativecommons.org/licenses/by/3.0/ . Both recordings were downmixed/resampled, normalized and seam-crossfaded; the idle layer was filtered. Attribution is also shown in the game's Settings → Sound & art credits.

## Cliff Side texture

Poly Haven, CC0. Photography by Dario Barresi and James Ray Cock; processing by Jenelle van Heerden. Source: https://polyhaven.com/a/cliff_side . License: https://polyhaven.com/license . The 1K diffuse map is shared by the campaign cliff material.