EditHero: A Benchmark for Long-Horizon Part-Level 3D Editing and Vibe Modeling

Ruihan Yu^1,2*, Yu-Ju Tsai^3,4*, Muyao Niu^1,2, Runyi Li^1,2, Lian Fu^1,2, Hanqing Liu², Zheng-Hui Huang¹, Yonghao Yu¹, Sho Kuno^1,2, Ming-Hsuan Yang^4†, Kaipeng Zhang^1†, Zhixiang Wang^1†

¹Alaya Lab    ²The University of Tokyo    ³Institute of Science Tokyo    ⁴University of California, Merced

^*Equal contribution    ^†Corresponding authors

📰 News

• [2026-10-08] Data engine and the full dataset released (Hugging Face).
• [2026-10-01] Paper released on arXiv.
• [2026-09-29] Project page and trailer released.

🚀 Release Roadmap

• Project page
• Paper
• Data engine, rebuild and render script
• Edit chains on Hugging Face (states, recipes, parts, four-view renders, part masks)

📦 Data

457 edit chains, 2,755 edits and 3,212 states on 252 host objects, at huggingface.co/datasets/AlayaLab/EditHero:

huggingface-cli download AlayaLab/EditHero --repo-type dataset --local-dir EditHero

Every chain comes with its instructions, the exact state after every turn (GLB), the recipe that rebuilds it, every part it uses, renders of every state from a fixed four-view rig (view 0 is the conditioning view, views 1-3 are held out) and 2D masks of the parts edited in each turn. See the dataset card for the layout and the licenses.

🛠️ Code

Path	Contents
part_assembly/	Data engine. chain_run.py builds chains (slot selection, retrieval, placement and contact checks); embed_*.py part retrieval; restyle_serve.py + tex_serve.py retexturing (Qwen-Image-Edit-2509 restyle, TRELLIS.2 texturing into a non-overlapping UV, kept regions carried over); blender_serve.py resident render worker
part_assembly/tools/assemble.py	Rebuilds every state of a chain from its recipe and the parts, and verifies it against checks.json
part_assembly/uv_rebake/	Re-bake of retexture turns into non-overlapping UVs
scripts/render_state.py	Renders a state (or your own GLB) with a chain's fixed four-view rig, exactly like the renders in the dataset
jobs/rebuild_all.sh	Rebuilds and verifies every chain of the dataset

Paths come from environment variables with defaults relative to this repository (part_assembly/local_paths.py): PXFORM_BLENDER (Blender 4.2), PXFORM_RENDER_SCRIPT (blender_kit's scripts/render.py), PXFORM_LIBRARY_ROOT (part library for building new chains), PXFORM_ENCODER_PYTHON (TRELLIS.2 environment).

Rebuild the chains

bash jobs/rebuild_all.sh EditHero/data out/
# PASS A/1a3267df_s0 (verified vs checks.json) ...

Render a state

git clone https://github.com/AuroraRyan0301/Blender-Visualization-Skill third_party/blender_kit
python scripts/render_state.py --data EditHero/data --chain A/1a3267df_s0 --turn 1 --out out/A_1a3267df_s0_turn01
# out/.../f0000.png (cond view), f0001-f0003.png (held-out views); pass --glb your_result.glb to render your own edit

All renders in EditHero are made with blender_kit, a small Blender/Cycles toolkit for checking generation and reconstruction results by eye. If it saves you an afternoon of arguing with Blender, a ⭐ on it would make its author's day.

📄 License

Code: MIT (LICENSE); third-party components: THIRD_PARTY_LICENSES.md. Data: see the dataset card (our annotations CC BY 4.0; meshes, textures and renders keep the license of their source objects).

BibTeX

@misc{yu2026editherobenchmarklonghorizonpartlevel,
      title={EditHero: A Benchmark for Long-Horizon Part-Level 3D Editing and Vibe Modeling},
      author={Ruihan Yu and Yu-Ju Tsai and Muyao Niu and Runyi Li and Lian Fu and Hanqing Liu and Zheng-Hui Huang and Yonghao Yu and Sho Kuno and Ming-Hsuan Yang and Kaipeng Zhang and Zhixiang Wang},
      year={2026},
      eprint={2610.02298},
      archivePrefix={arXiv},
      primaryClass={cs.CV},
      url={https://arxiv.org/abs/2610.02298},
}