MLL-Lab/tos-data

Theory of Space： Visual Scene Dataset

This dataset provides pre-rendered 3D multi-room environments for evaluating spatial reasoning in Vision Language Models (VLMs). It is designed to support the Theory of Space (ToS) benchmark, which tests whether foundation models can actively construct spatial beliefs through exploration.

Paper: Theory of Space: Can Foundation Models Construct Spatial Beliefs through Active Exploration?
Project Page: https://theory-of-space.github.io
GitHub Repository: https://github.com/mll-lab-nu/Theory-of-Space

Dataset Overview

Property	Value
Rooms	3
Total Runs	100
Objects per Room	4
Includes False-Belief Data	Yes

Usage

Download

Download via Hugging Face CLI:

# Add huggingface token (optional, avoid 429 rate limit)
# export HF_TOKEN=
hf download MLL-Lab/tos-data --repo-type dataset --local-dir room_data

Or use the ToS setup script which downloads automatically:

git clone --single-branch --branch release https://github.com/mll-lab-nu/Theory-of-Space.git
cd Theory-of-Space
source setup.sh

Sample Usage

To run a full pipeline evaluation (explore + eval + cogmap) using the provided scripts:

python scripts/SpatialGym/spatial_run.py \
  --phase all \
  --model-name gpt-5.2 \
  --num 25 \
  --data-dir room_data/3-room/ \
  --output-root result/ \
  --render-mode vision,text \
  --exp-type active,passive \
  --inference-mode batch

File Structure

tos-data/
└── runXX/                              # 100 runs (run00 - run99)
    ├── meta_data.json                  # Scene metadata (layout, objects, positions)
    ├── falsebelief_exp.json            # False-belief experiment data
    ├── top_down.png                    # Top-down view of the scene
    ├── top_down_annotated.png          # Annotated top-down view
    ├── top_down_fbexp.png              # Top-down view (false-belief state)
    ├── agent_facing_*.png              # Agent perspective images (north/south/east/west)
    ├── <object_id>_facing_*.png        # Object/door camera views
    ├── *_fbexp.png                     # False-belief experiment images
    └── top_down/
        └── img_0000.png                # Additional top-down renders

File Descriptions

File	Description
meta_data.json	Complete scene metadata including room layout, object positions, orientations, and connectivity
falsebelief_exp.json	Specifies object modifications (move/rotate) for belief update evaluation
agent_facing_*.png	Egocentric views from agent's perspective in 4 cardinal directions
<object_id>_facing_*.png	Views from each object/door position
*_fbexp.png	Images rendered after false-belief modifications
top_down*.png	Bird's-eye view for visualization and debugging

Citation

@inproceedings{zhang2026theoryofspace,
  title     = {Theory of Space: Can Foundation Models Construct Spatial Beliefs through Active Exploration?},
  author    = {Zhang, Pingyue and Huang, Zihan and Wang, Yue and Zhang, Jieyu and Xue, Letian and Wang, Zihan and Wang, Qineng and Chandrasegaran, Keshigeyan and Zhang, Ruohan and Choi, Yejin and Krishna, Ranjay and Wu, Jiajun and Li, Fei-Fei and Li, Manling},
  booktitle = {International Conference on Learning Representations (ICLR)},
  year      = {2026},
}