# 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.

## Offline cinematic derivative (2026-09-21)

The current landing page uses pre-rendered stills and camera videos based on the
BMW, Mercedes-AMG and Porsche models credited above. Blender scene authoring:
`scripts/render_cinematic.py`. Derivative changes include repaired split normals,
adjusted paint/glass/metal materials, a procedural limestone showroom, architectural
lighting, camera animation and mobile crops. Model authors and CC BY 4.0 attribution
remain applicable to these rendered derivatives. These are illustrative renders,
not photographs of vehicles currently offered for sale.

The original WebGL assets remain available as source material but are not loaded
by the cinematic landing page. The following HDRI credit relates to that earlier
renderer; the offline scene uses authored area lights rather than this HDRI.

## Studio lighting environment (earlier WebGL renderer)

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.