LaRI is a single-feed-forward method that models unseen 3D geometry using layered point maps. It enables complete, efficient, and view-aligned geometric reasoning from a single image.

• Inference code & Gradio demo
• Evaluation data & code
• Training data & code
• Release the GT generation code (Estimated time: within July, 2025)

1. Create the conda environment and install required libraries:

conda create -n lari python=3.10 -y
conda activate lari
pip install -r requirements.txt

2. Install Pytorch3D following these instructions.

We currently provide the object-level model at our HuggingFace Model Hub. Try the examples or use your own images with the methods below:

Launch the Gradio interface locally:

python app.py

Or try it online via HuggingFace Demo.

Run object-level modeling with:

python demo.py --image_path assets/cole_hardware.png

The input image path is specified via --image_path. Set --is_remove_background to remove the background. Layered depth maps and the 3D model will be saved in the ./results directory by default.

Download the pre-trained weights and unzip the evaluation data.

./scripts/eval_object.sh

./scripts/eval_scene.sh

NOTE: For both object and scene evaluation, set data_path and test_list_path to the customized absolute paths, set --pretrained to your model checkpoint path, and set --output_dir to specify where to store the evaluation results.

Download the processed Objaverse dataset, extract all files (objaverse_chunk_<ID>.tar.gz) into the target folder, for example:

mkdir ./datasets/objaverse_16k
tar -zxvf  ./objaverse_chunk_<ID>.tar.gz -C ./datasets/objaverse_16k

Download the processed 3D-FRONT dataset, extract all files to the target folder. For example:

mkdir ./datasets/3dfront
tar -zxvf  ./front3d_chunk_<ID>.tar.gz -C ./datasets/3dfront

• Download the ScanNet++ dataset, as well as the ScanNet++ toolbox.
• Copy the .yml configuration files to the ScanNet++ toolbox folder, for example:

cd /path/to/lari
cp -r ./scripts/scannetpp_proc/*.yml /path/to/scannetpp/scannetpp/dslr/configs

• Run the following command in the ScanNet++ toolbox folder to downscale and undistort the data.

cd /path/to/scannetpp
# downscale the images
python -m dslr.downscale dslr/configs/downscale_lari.yml
# undistort the images
python -m dslr.undistort dslr/configs/undistort_lari.yml

• Download the ScanNet++ annotation from here and extract it to the data subfolder of your ScanNet++ path, for example

tar -zxvf  ./scannetpp_48k_annotation.tar.gz -C ./datasets/scannetpp_v2/data

Download MoGe pre-trained weights. For training with object-level data (Objaverse), run

./scripts/train_object.sh

For training with scene-level data (3D-FRONT and ScanNet++), run

./scripts/train_scene.sh

For both training settings, set data_path, train_list_path and test_list_path of each dataset to your customized absolute paths, set pretrained_path to the downloaded MoGe weights path, set --output_dir and --wandb_dir to specify where to store the evaluation results.

This prject is largely based on DUSt3R, with some model weights and functions from MoGe, Zero-1-to-3, and Marigold. Many thanks to these awesome projects for their contributions.

Please cite our paper if you find it helpful:

@inproceedings{li2025lari,
      title={LaRI: Layered Ray Intersections for Single-view 3D Geometric Reasoning}, 
      author={Li, Rui and Zhang, Biao and Li, Zhenyu and Tombari, Federico and Wonka, Peter},
      booktitle={arXiv preprint arXiv:2504.18424},
      year={2025}
}