# Showroom models

The scene is a demonstration, not inventory or a manufacturer endorsement.
BMW, Mercedes-Benz and Porsche names/marks identify the depicted vehicles.
The model licenses below do not grant trademark rights or imply affiliation.

## BMW M4 Competition M Package

Author: 𝙎𝙍𝙏 𝙋𝙚𝙧𝙛𝙤𝙢𝙖𝙣𝙘𝙚™ — https://sketchfab.com/TheRealSRT
Source: https://sketchfab.com/3d-models/bmw-m4-competition-m-package-5c0a2dafb1ad408d9fc9eeef9aee531b
License: CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/
License and author are preserved in the GLB asset.extras metadata.
Downloaded 2026-09-19 from the optimized derivative:
https://github.com/lukaizj/car-mod-saas/blob/main/public/models/bmw-m4.web.glb
Derivative documentation:
https://github.com/lukaizj/car-mod-saas/blob/main/public/models/ATTRIBUTION.md
Derivative changes: Meshopt compression, WebP/512px textures, four hidden cabin/engine
meshes and three unused textures removed. No geometry simplification.
Local rendering changes: normalized scale, silver body finish without racing livery,
adapted glass, wheel and trim materials; placement and lighting.

## Mercedes-AMG GT

Author: BRO — https://sketchfab.com/musawork786
Source: https://sketchfab.com/3d-models/mercedes-amg-gt-7a778057a6fc461a9d7b0e31850a375f
License: CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/
License and author are preserved in the GLB asset.extras metadata.
Downloaded 2026-09-19 from:
https://github.com/deshmukhharsh867-cmd/HD-car-racing/blob/main/mercedes/mercedes_amg_gt.glb
Runtime asset: mercedes-amg-gt-detail.glb (1,725,519 triangles).
Local changes: Meshopt compression/deduplication/quantization, original textures kept;
no geometry simplification; normalized scale, graphite body, neutral trim/lights/glass.
The earlier simplified mercedes-amg-gt-web.glb is retained but no longer loaded:
its reduced topology damaged the grille badge and windshield edge in close-up.

## 2014 Porsche Cayman S (981)

Author: Ddiaz Design — https://sketchfab.com/ddiaz-design
Source: https://sketchfab.com/3d-models/2014-porsche-cayman-s-981-03e383400bb74626bcdedbbe198a5849
License: CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/
License and author are preserved in the GLB asset.extras metadata.
Downloaded 2026-09-19 from:
https://github.com/deshmukhharsh867-cmd/HD-car-racing/blob/main/porsche/2014_porsche_cayman_s_981.glb
Local changes: Meshopt compression/deduplication/quantization, original textures kept,
no geometry simplification; normalized scale, champagne paint and adapted glass.

## Previous Car Concept (retained source, no longer loaded)

Model and textures: Eric Chadwick, Darmstadt Graphics Group GmbH, 2024.
License: Creative Commons Attribution 4.0 International.
https://creativecommons.org/licenses/by/4.0/

Source: https://github.com/KhronosGroup/glTF-Sample-Assets/tree/main/Models/CarConcept
Downloaded 2026-09-18; source documentation is preserved in car-concept-source.md.

Local rendering changes: graphite/silver/bronze body materials, dark interior and glass,
hidden License Plate and InteriorSteeringEmblem meshes (Khronos/3D Commerce marks),
normalized scale and placement in the showroom. The downloaded GLB is unmodified.
The render is a demonstration concept, not a real vehicle listing or an endorsement.

Three.js r180: MIT License, preserved in ../vendor/three/LICENSE.
Meshopt decoder, Arseny Kapoulkine: MIT License, notice included in
../vendor/three/meshopt_decoder.module.js (Three.js r180 distribution).
Full license: ../vendor/three/MESHOPT-LICENSE.txt.

## Studio lighting environment

Poly Haven Studio HDRI by Greg Zaal / Poly Haven.
Source: https://polyhaven.com/a/poly_haven_studio
License: CC0 — https://creativecommons.org/publicdomain/zero/1.0/
Runtime derivative: official 1K Radiance HDR file, used for reflections and
image-based lighting only; the photographed environment is not shown as the scene background.