Duplicate from hcislab/digital-twin

Co-authored-by: Lin Hsiang En <wil-li-li@users.noreply.huggingface.co>

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CITATION.cff

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+cff-version: 1.2.0
+message: "If you use this dataset, please cite it as below."
+title: "Room 305 Digital Twin"
+type: dataset
+authors:
+  - name: "Human-centered Intelligent System Lab (HCIS Lab)"
+date-released: "2026-06-30"
+url: "https://huggingface.co/datasets/hcislab/digital-twin"
+license: CC-BY-NC-4.0
+keywords:
+  - digital-twin
+  - usd
+  - isaac-sim
+  - lighting

README.md

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+---
+license: cc-by-nc-4.0
+tags:
+  - digital-twin
+  - usd
+  - isaac-sim
+  - lighting
+pretty_name: Room 305 Digital Twin
+---
+
+# Room 305 Digital Twin
+
+A USD digital twin of NYCU Room 305 (lighting scene), built by the **Human-centered Intelligent System Lab (hcislab)** — [GitHub @HCIS-Lab](https://github.com/HCIS-Lab). Authored for **NVIDIA Isaac Sim 5.1**.
+
+**Lab links:** [GitHub @HCIS-Lab](https://github.com/HCIS-Lab) · [HF @hcislab](https://huggingface.co/hcislab)
+
+## Contents
+
+```
+nycu_light_collider.usd    # main scene — open this in Isaac Sim (geometry + colliders + materials + lights)
+nycu_lights.usdz           # referenced geometry + textures (center.jpg, Translucent_Glass_Tinted.jpg)
+```
+
+`nycu_light_collider.usd` references `nycu_lights.usdz` by a **relative** path, so the two files must stay side by side. `snapshot_download` keeps them together automatically.
+
+Scene stats (loaded in Isaac Sim 5.1): 443 meshes (~188k points), 419 materials / 459 shaders, a `DomeLight` + `RectLight`. Approx extent 12.1 × 7.0 × 3.4 m.
+
+## Usage
+
+```python
+from huggingface_hub import snapshot_download
+
+path = snapshot_download(
+    repo_id="hcislab/digital-twin",
+    repo_type="dataset",
+)
+# open path/nycu_light_collider.usd in Isaac Sim 5.1
+```
+
+In Isaac Sim (Python):
+
+```python
+import omni.usd
+omni.usd.get_context().open_stage(f"{path}/nycu_light_collider.usd")
+```
+
+## Notes
+
+- Textures are bundled inside `nycu_lights.usdz` and resolve via relative paths — verified self-contained with `UsdUtils.ComputeAllDependencies`.
+- Two references resolve **at runtime** in Isaac Sim / Omniverse and are intentionally not bundled:
+  - `OmniGlass.mdl` — Omniverse stock material library.
+  - A Cloudy dome-light HDR served from the Omniverse content CDN.
+  Materials and dome lighting need an Omniverse asset connection / cache to display fully; geometry and the `RectLight` load without it.
+- Verified to open cleanly in Isaac Sim 5.1 from a fresh download.
+
+## Citation
+
+If you use this digital twin, please cite it:
+
+```bibtex
+@misc{hcislab_room305_2026,
+  title        = {Room 305 Digital Twin},
+  author       = {{Human-centered Intelligent System Lab}},
+  year         = {2026},
+  howpublished = {Hugging Face dataset},
+  url          = {https://huggingface.co/datasets/hcislab/digital-twin},
+  note         = {NVIDIA Isaac Sim 5.1 USD digital twin}
+}
+```
+
+A machine-readable `CITATION.cff` is included (Hugging Face renders a "Cite this" entry from it).
+
+## License
+
+**CC BY-NC 4.0** ([Creative Commons Attribution-NonCommercial 4.0](https://creativecommons.org/licenses/by-nc/4.0/)).
+
+- ✅ Share and adapt for **non-commercial** research/education, **with attribution** (cite as above).
+- ❌ **No commercial use** without separate permission from the lab. For commercial licensing, contact **hcislab01@gmail.com**.
+
+Note: the referenced `OmniGlass.mdl` and dome-light HDR are NVIDIA Omniverse assets governed by their own licenses; they are not redistributed here.

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