# LIAN LI / DAN Cases A3-mATX source notice

Modification date: 2026-09-11.

## Asset and provenance

This notice accompanies the fixed homepage derivative at public/assets/homepage/case.glb.
The geometry was prepared from the existing project asset "public/assets/products/lian-li-a3-matx/lian-li-a3-matx.glb", which in turn was prepared from the standard ribbed-front A3-mATX STEP source:

- CAD source: "artifacts/asset-research/peripherals/other/lian-li-a3-matx/source/extracted/LIAN LI - A3 mATX.stp"
- CAD format: CATIA V5 R21 STEP AP203
- CAD SHA-256: "AAF664482094D5F179322E00EC87A43B2BE103466863FA70145BB98F007E8E96"
- Source archive: "artifacts/asset-research/peripherals/other/lian-li-a3-matx/source/LIAN LI - A3 mATX.7z"
- Source archive bytes: 3519997
- Source archive SHA-256: "f9480cfe9892bf6c17335d66fae11ca78d87dcb750de7d02791306cef484f9a2"
- Source GLB bytes: 2754988
- Source GLB SHA-256: "6c2632621e6a2a6d7ed6dcb0d06fad8dab606ab7022291e2fc080c3506ed0111"
- Local acquisition record: "artifacts/asset-research/peripherals/other/lian-li-a3-matx/evidence/acquisition.json"
- Retrieved: 2026-09-07T04:28:29.3072102Z

Official source pages:

- Product page: https://lian-li.com/product/a3-matx/
- STEP download page: https://drive.google.com/file/d/1_SBvvmGhpPntNA4QP_dzn3BFCGPX1VbY/view?usp=drive_link
- Direct download URL: https://drive.google.com/uc?export=download&id=1_SBvvmGhpPntNA4QP_dzn3BFCGPX1VbY

The source contract is meters, +Y up, +Z front, centered on X/Z, with the bottom at Y=0. The native selected CAD envelope is 194.000000003 mm wide, 321.50000000018997 mm high, and 451.6000010070001 mm deep. The product page publishes 443 mm depth; the existing source record retains the native 451.6 mm envelope because the measurement convention is unresolved.

The source contains the standard ribbed front fascia. It does not represent the A3-mATX-WD wood edition, A3-mATX-WDG glass edition, or A3-3WD wood accessory panel. Internal brackets, electronics, fasteners, loose accessories, logos, PCB, and connector internals are omitted by the source preparation record. The exterior bottom chassis, front I/O fascia, power button, and all retained feet remain represented.

## Homepage derivative

The derivative keeps all ten named source exterior meshes and five source material names. It welds and meshoptimizer-simplifies each mesh with border locking, quantizes positions to 14 bits and normals to 10 bits, and stores EXT_meshopt_compression. The derivative is 473232 bytes and 39468 triangles.

- Derivative path: public/assets/homepage/case.glb
- Derivative SHA-256: "4087711465fec483823a9a6c212c996197f5020880da182a25c4fcd68b4125da"
- Source GLB to derivative size: 2754988 -> 473232 bytes
- Source to derivative triangles: 81464 -> 39468
- Authored perforation texture: "A3_Perforation_Normal_128", image/png, 5367 bytes, SHA-256 "0c5dc0cc4131b2d3702cb4edc65a5dad3222277de6c439b31e111375b126e56a"
- Source perforation UVs are stored as TEXCOORD_1; runtime may use TEXCOORD_0 for physical wear.

The perforation map is a 128 px repeating tangent-space normal tile at the existing 2.45 mm pitch. It suggests the fine panel pattern and is not literal through-hole geometry. The GLB contains a plain PNG and requires the existing Meshopt decoder for geometry; no KTX2, Basis, WebP, or editor import is part of this derivative.

## Permission status

No explicit CAD license located on the official product page or download. The official product page provides the STEP download but does not state permission to redistribute, convert, or embed the CAD source commercially. This homepage derivative was included at the project owner's direction while permission remains unverified.

Keep this notice with the derivative and do not describe LIAN LI or DAN Cases as endorsing Deskspace or this adaptation. Product names and marks remain the property of their respective owners. Confirm redistribution and commercial embedding permission before publishing this asset outside the project.