Encode geometry at meshopt high level: 4.0 GB to 3.2 GB, same look (part 8)

README.md

@@ -37,12 +37,12 @@ they show. If you use these files, credit NVIDIA as the original author and link
 | | Blender export | This dataset |
 |---|---|---|
 | Assets | 2,595 | 2,595 |
-| Total size | 228.1 GB | 4.0 GB |
+| Total size | 228.1 GB | 3.2 GB |
 | Triangles | 821M | 415M |
 | Largest texture edge | 4096 px | 1024 px |
 
 Example: the V8 engine (`engineAssembly_v8_engine_a01`) is an 888 MB glb out of Blender and
-9.3 MB here. Its first frame in Chrome took 9.4 s before and 0.57 s after.
+7.4 MB here. Its first frame in Chrome took 9.4 s before and 0.57 s after.
 
 ## What is in it
 
@@ -53,7 +53,7 @@ Example: the V8 engine (`engineAssembly_v8_engine_a01`) is an 888 MB glb out of
 
 ## Download
 
-All files, about 4.0 GB:
+All files, about 3.2 GB:
 
 ```bash
 hf download codepawl/simready-glb --repo-type dataset --local-dir simready-glb
@@ -95,7 +95,8 @@ loader.load('engineAssembly_v8_engine_a01.glb', (gltf) => scene.add(gltf.scene))
    original textures.
 4. Optimize with glTF Transform 4.5. Remove the USD instance prototypes Blender brings in next to the placed parts,
    remove duplicate mesh instances, then dedup, prune and weld.
-5. Resize textures to 1024 px as WebP. Compress geometry with meshopt (`EXT_meshopt_compression`).
+5. Resize textures to 1024 px as WebP. Compress geometry with meshopt at its high level
+   (`EXT_meshopt_compression` with octahedral normals and quantized attributes).
 
 Assets with UDIM textures have each tile split into its own material before the export, with its UVs moved into 0-1.
 Blender's own UDIM handling in the glTF exporter drops the faces of some tiles.
@@ -112,6 +113,8 @@ glTF PBR, so MDL-only shader effects are lost.
 
 ## Changelog
 
+- 2026-10-29: Geometry is encoded at meshopt's high level. The set went from 4.0 GB to 3.2 GB with the same
+  triangles and no visible change in any of the 2,595 thumbnails.
 - 2026-10-29: 52 files with UDIM textures were missing geometry, because Blender's glTF exporter dropped
   the faces of some texture tiles (for example crate_plywood_b01 kept only its metal frame). They are exported again
   with the tiles split before the export.

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