Card: WebGL numbers, Unreal import note

README.md

@@ -113,7 +113,7 @@ loader.setMeshoptDecoder(MeshoptDecoder);
 loader.load('Clue_Board_Game_Classic_Edition.glb', (gltf) => scene.add(gltf.scene));
 ```
 
-## For games and WebGPU: KTX2 and LODs
+## For web games and WebGPU: KTX2 and LODs
 
 A WebP texture is decoded to full RGBA on the GPU. `objects_ktx2/` has the same 1,033 objects with KTX2 textures
 (ETC1S, full mip chain, `KHR_texture_basisu`), which stay block compressed in VRAM. `lods/` adds three simpler levels of
@@ -136,6 +136,9 @@ Load time for one object, median of 20 objects with 5 loads each:
 | three.js WebGPURenderer, load and first frame | 48.1 ms | 27.0 ms |
 | 67js, load | 49.0 ms | 30.4 ms |
 
+three.js WebGLRenderer was measured on a smaller sample, 5 objects with 3 loads each. It loaded the WebP file in
+45.1 ms and the KTX2 file in 26.3 ms. With the first frame, they took 67.3 ms and 35.4 ms. It also transcoded KTX2 to BC7.
+
 Measured on an RTX 3060 in headless Chrome (ANGLE D3D11, WebGPU backend), three.js r187 and 67js 0.15.0, files from
 localhost. VRAM counts texture and geometry bytes as uploaded: the KTX2 files transcode to BC7 on this GPU, and WebP is
 RGBA8 with mips. The GPU was shared with other jobs, so the ratios are more reliable than the milliseconds. Phones
@@ -183,6 +186,16 @@ reported one BC7 2048 px texture with no warnings. The textures were encoded wit
 (ETC1S, `--clevel 0 --qlevel 128 --genmipmap`). ETC1S was chosen over UASTC because these scans have only a colour map.
 The LODs use meshopt simplify with error caps of 0.01, 0.03 and 0.08.
 
+Game engines: Unreal Engine 5.8 does not import these files, because its glTF importer does not read
+`EXT_meshopt_compression`. For Unreal, decode a file from `objects/` first. The command below writes plain geometry
+and PNG textures. A SimReady file made this way imported into Unreal 5.8 with its textures:
+
+```bash
+npx @gltf-transform/cli png Clue_Board_Game_Classic_Edition.glb Clue_plain.glb --formats "*"
+```
+
+Unity and Godot were not tested. `collision_hulls.json` holds one convex hull per object for any physics engine.
+
 ## Categories and mass
 
 The source gives a product name and, for some objects, a retail category that is often missing or wrong (a shoe