add glTF sample models

.gitattributes

@@ -58,3 +58,8 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 # Video files - compressed
 *.mp4 filter=lfs diff=lfs merge=lfs -text
 *.webm filter=lfs diff=lfs merge=lfs -text
+CesiumMan.glb filter=lfs diff=lfs merge=lfs -text
+DamagedHelmet.glb filter=lfs diff=lfs merge=lfs -text
+Fox.glb filter=lfs diff=lfs merge=lfs -text
+MetalRoughSpheres.glb filter=lfs diff=lfs merge=lfs -text
+ToyCar.glb filter=lfs diff=lfs merge=lfs -text

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Fox.glb

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LICENSE.md

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+Each model keeps the license of its source in the Khronos glTF Sample Assets repository:
+https://github.com/KhronosGroup/glTF-Sample-Assets
+
+- DamagedHelmet: CC-BY 4.0 (ctxwing) and CC-BY-NC 4.0 (theblueturtle_). Non-commercial use only.
+- Fox: CC0 1.0 (PixelMannen), CC-BY 4.0 (tomkranis), CC-BY 4.0 (AsoboStudio and scurest)
+- CesiumMan: CC-BY 4.0 (Cesium). The Cesium logo is a trademark of Cesium.
+- AnimatedMorphCube: CC0 1.0 (Microsoft)
+- ToyCar: CC0 1.0 (Guido Odendahl, Eric Chadwick)
+- MetalRoughSpheres: CC-BY 4.0 (Ed Mackey)
+- FlightHelmet: CC0 1.0 (Gary Hsu)

MetalRoughSpheres.glb

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README.md

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+---
+license: other
+license_name: mixed
+license_link: LICENSE.md
+pretty_name: 3D model samples
+tags:
+- 3d
+- gltf
+- glb
+---
+
+# 3D model samples
+
+A few standard glTF / GLB models for testing 3D previews and viewers. Open any file on the Hub to see it in the viewer.
+
+All models come from the [Khronos glTF Sample Assets](https://github.com/KhronosGroup/glTF-Sample-Assets) and keep their original licenses (see below).
+
+| File | What it tests | License | Credit |
+| --- | --- | --- | --- |
+| `DamagedHelmet.glb` | Textured PBR, emissive | CC-BY 4.0 and CC-BY-NC 4.0 (non-commercial) | ctxwing, theblueturtle_ |
+| `Fox.glb` | Skinned animation (three clips) | CC0 1.0 and CC-BY 4.0 | PixelMannen, tomkranis, AsoboStudio and scurest |
+| `CesiumMan.glb` | Skinned animation | CC-BY 4.0 | Cesium |
+| `AnimatedMorphCube.glb` | Morph target animation | CC0 1.0 | Microsoft |
+| `ToyCar.glb` | Clearcoat, sheen and transmission | CC0 1.0 | Guido Odendahl, Eric Chadwick |
+| `MetalRoughSpheres.glb` | Metallic / roughness grid | CC-BY 4.0 | Ed Mackey |
+| `FlightHelmet/FlightHelmet.gltf` | Multi-file glTF (`.bin` and separate textures), 46 MB | CC0 1.0 | Gary Hsu |
+
+Full license and attribution details for each model are in its folder in the [Khronos repository](https://github.com/KhronosGroup/glTF-Sample-Assets/tree/main/Models).

ToyCar.glb

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