# 3D prototype asset attribution

## Ferrari 458 Italia (`car.glb`)

- Original author: **vicent091036**.
- Original model page: https://sketchfab.com/models/57bf6cc56931426e87494f554df1dab6
- Distribution: official Three.js car-materials example, https://threejs.org/examples/webgl_materials_car.html
- Downloaded from: https://raw.githubusercontent.com/mrdoob/three.js/dev/examples/models/gltf/ferrari.glb
- Stable asset commit: https://github.com/mrdoob/three.js/blob/6eec560494b0492cb72b6120ea2405bf4e4fe9c7/examples/models/gltf/ferrari.glb
- Asset license: **Creative Commons Attribution 4.0 International (CC BY 4.0)**, https://creativecommons.org/licenses/by/4.0/
- License evidence: the Three.js repository's media-license audit explicitly identifies `gltf/ferrari.glb` as CC BY 4.0: https://github.com/mrdoob/three.js/issues/23089 . The original Sketchfab page was unavailable when checked on 2026-10-18; attribution and license are retained from the official distributor's records.
- Modifications: file renamed from `ferrari.glb` to `car.glb`; on 2026-11-04 the unused texture coordinates were removed and the Draco data re-encoded with 12-bit positions and 8-bit normals (`scripts/optimize-model.mjs`), with no simplification of the mesh. The prototype changes materials, lighting, and camera presentation at runtime. The hero poster images (`/graphics/car-poster-*.webp`) are renders of this modified model.

Suggested visible credit: “Modelo 3D: Ferrari 458 Italia por vicent091036 · CC BY 4.0 · via Three.js”, linked to this attribution or the original source and license.

The model is an illustrative prototype asset, not a photograph of Crossover's work. Neither its author nor Ferrari endorses Crossover. The model's copyright license does not grant trademark rights.

## Shadow (`car-shadow.png`)

Contact-shadow texture accompanying the same Three.js example, downloaded from https://raw.githubusercontent.com/mrdoob/three.js/6eec560494b0492cb72b6120ea2405bf4e4fe9c7/examples/models/gltf/ferrari_ao.png . Preserve the model attribution above when using it with the car.

## Draco decoder (`draco/`)

Official Google Draco decoder as distributed in Three.js r180:
https://github.com/mrdoob/three.js/tree/r180/examples/jsm/libs/draco/gltf

Copyright Google Inc. Licensed under Apache License 2.0. A copy is included at `draco/LICENSE`. Upstream: https://github.com/google/draco

## Integration notes

- Binary glTF 2.0, 1.0 MB; uses `KHR_draco_mesh_compression`.
- Use `DRACOLoader.setDecoderPath('/models/draco/')` and `GLTFLoader`.
- Up is +Y; front is -Z. A useful initial camera is `(4.25, 1.4, -4.5)`, looking at `(0, 0.5, 0)`.
- Recolor mesh `body`; glass mesh is `glass`; wheels are `wheel_fl`, `wheel_fr`, `wheel_rl`, `wheel_rr`; rims are `rim_fl`, `rim_fr`, `rim_rl`, `rim_rr`; `trim` is separately accessible.
- Original materials include `Body_Color`, `Glass_Gray`, `Tires`, `metal_chrome`, `metal_gray`, `Leather`, and `Ferrari_Yellow`.