Add SF3D WebGPU weights, license, notice, and model card

LICENSE.md

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NOTICE

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+This Stability AI Model is licensed under the Stability AI Community License,
+Copyright © Stability AI Ltd. All Rights Reserved.
+
+------------------------------------------------------------------------------
+Derivative Work notice
+------------------------------------------------------------------------------
+
+The above attribution applies to the Stability AI Materials — the Stable Fast 3D
+model (stabilityai/stable-fast-3d) from which these weights are derived.
+
+This repository distributes a DERIVATIVE WORK of the Stability AI Materials.
+The original Stable Fast 3D weights have been modified as follows:
+
+  - Converted from the original PyTorch `model.safetensors` checkpoint into a
+    single flat binary (`weights.bin`) laid out for direct loading by WebGPU
+    compute shaders (a 16-byte header, a fixed-size tensor table, and packed,
+    16-byte-aligned tensor data).
+  - Cast to fp16.
+  - 2D linear/projection weight tensors transposed from PyTorch's
+    [out_features, in_features] to [in_features, out_features] for row-major
+    shader access.
+  - Illumination/global-estimator tensors and buffers not used by the WebGPU
+    inference path omitted; marching-tetrahedra integer buffers retained.
+
+No model architecture or learned parameter values were otherwise altered; this
+is a format conversion of the original weights for browser (WebGPU) inference.
+
+Conversion tooling: https://github.com/lyonsno/sf3d-webgpu
+(see tools/convert_weights.py).

README.md

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+---
+license: other
+license_name: stability-ai-community
+license_link: LICENSE.md
+base_model: stabilityai/stable-fast-3d
+tags:
+  - 3d-generation
+  - image-to-3d
+  - webgpu
+  - stable-fast-3d
+library_name: webgpu
+---
+
+# SF3D WebGPU Weights
+
+WebGPU-ready weights for [**SF3D WebGPU**](https://github.com/lyonsno/sf3d-webgpu) —
+a browser port of Stability AI's [Stable Fast 3D](https://huggingface.co/stabilityai/stable-fast-3d)
+that runs single-image → textured 3D mesh generation entirely in WebGPU compute
+shaders. No server, no Python, no ONNX at inference time.
+
+This repository hosts the converted model weights so you can skip the PyTorch
+conversion step: **clone the app, download `weights.bin`, run.**
+
+> **Powered by Stability AI.**
+
+## Files
+
+| File | Description |
+|------|-------------|
+| `weights.bin` | Flat fp16 binary (~2.1 GB) for direct WebGPU loading |
+| `LICENSE.md` | Stability AI Community License (governs these weights) |
+| `NOTICE` | Attribution + derivative-work modification notice |
+
+```
+SHA-256(weights.bin) = 0e5c23c8c502492c0b4432006ac30f2d11b2a4c102a3bf9f21c2fcf094ddbffd
+```
+
+## Usage
+
+```bash
+git clone https://github.com/lyonsno/sf3d-webgpu
+cd sf3d-webgpu
+npm install
+
+# Download these weights into public/
+hf download BasinShapers/sf3d-webgpu-weights weights.bin --local-dir public/
+
+npm run dev   # open http://localhost:5177/
+```
+
+On an M4 Max the demo image generates a textured GLB in ~33s. See the
+[application repo](https://github.com/lyonsno/sf3d-webgpu) for the full pipeline,
+architecture, and PyTorch-parity receipts (the demo output is byte-for-byte
+reproducible).
+
+## What these weights are
+
+This is a **derivative work** of Stability AI's Stable Fast 3D: a format
+conversion of the original `model.safetensors` into a single flat binary laid
+out for WebGPU compute shaders (fp16, transposed linear weights, WebGPU-relevant
+tensors only). The model architecture and learned values are unchanged. Full
+details are in [`NOTICE`](NOTICE); the conversion tool is
+[`tools/convert_weights.py`](https://github.com/lyonsno/sf3d-webgpu/blob/main/tools/convert_weights.py).
+
+## License
+
+These weights are governed by the **Stability AI Community License** (see
+[`LICENSE.md`](LICENSE.md)). In summary:
+
+- **Free** for research, non-commercial, and **commercial use by organizations
+  and individuals with annual revenue of US $1,000,000 or less.**
+- Organizations exceeding that threshold must obtain an
+  [Enterprise License](https://stability.ai/enterprise) from Stability AI before
+  commercial use of SF3D or any derivative work.
+
+*This Stability AI Model is licensed under the Stability AI Community License,
+Copyright © Stability AI Ltd. All Rights Reserved.*

weights.bin

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+version https://git-lfs.github.com/spec/v1
+oid sha256:0e5c23c8c502492c0b4432006ac30f2d11b2a4c102a3bf9f21c2fcf094ddbffd
+size 2285308688