BlenderProc2 for 3D-Front

Support BlenderProc2 with multi-GPU batch rendering and 3D visualization for the 3D-Front dataset.

If you feel struggled in rendering 3D-Front or visualizing its 3D assets for your tasks. Here is a solution based on BlenderProc2 and VTK.

2D rendering

RGB	Depth	Semantics	Instances

3D visualization

Pointcloud	Layout & Camera Poses	CAD models + Oriented Bounding Boxes

Note:

• X server is required for 3D visualization.
• OpenGL camera setting is used.

Please check the orginal REAME if you want to know all the functions in BlenderProc2.

---

Install

1. Use conda to deploy the environment by

   cd BlenderProc-3DFront
   conda env create -f environment.yml
   conda activate blenderproc
   pip install -e .
   

2. Apply for the 3D-Front dataset. Download all the data and link them to the local directory as follows:

   examples/datasets/front_3d_with_improved_mat/3D-FRONT
   examples/datasets/front_3d_with_improved_mat/3D-FRONT-texture
   examples/datasets/front_3d_with_improved_mat/3D-FUTURE-model
   

3. Download textures data from link by

   blenderproc/scripts/download_cc_textures.py
   

---

Render

1. Single scene rendering

   Here we take the scene ID 6a0e73bc-d0c4-4a38-bfb6-e083ce05ebe9.json as an example. We can do multi-view renderings by running the script as follows:

   blenderproc run \
   examples/datasets/front_3d_with_improved_mat/render_dataset_improved_mat.py \
   examples/datasets/front_3d_with_improved_mat/3D-FRONT \
   examples/datasets/front_3d_with_improved_mat/3D-FUTURE-model \
   examples/datasets/front_3d_with_improved_mat/3D-FRONT-texture \
   6a0e73bc-d0c4-4a38-bfb6-e083ce05ebe9.json \
   resources/cctextures/ \
   examples/datasets/front_3d_with_improved_mat/renderings
   

   • The rendering results will be saved in examples/datasets/front_3d_with_improved_mat/renderings.
   • You can also customize your camera FOV, rendering resolution and number of views, etc. in render_dataset_improved_mat.py. Just dive deeper and play with it.
   • You can also output normal maps or depth maps by uncomment bproc.renderer.enable_normals_output() and bproc.renderer.enable_depth_output(activate_antialiasing=False).
   • I customized the camera pose sampling function to support multi-view renderings. The sampling strategy ensures every camera pose has a reasonable object surface coverage.
   • The number of camera poses in a room is proportional to the ratio of its floor area to the whole apartment. Default camera pose number is 100 per apartment.

2. Batch scene rendering (support multi-GPU mode for parallel rendering)

   This script is built on the above function to support batch rendering. Run the following script to render all scenes in a loop.

   python examples/datasets/front_3d_with_improved_mat/multi_render.py \
   examples/datasets/front_3d_with_improved_mat/render_dataset_improved_mat.py \
   examples/datasets/front_3d_with_improved_mat/3D-FRONT \
   examples/datasets/front_3d_with_improved_mat/3D-FUTURE-model \
   examples/datasets/front_3d_with_improved_mat/3D-FRONT-texture \
   resources/cctextures/ \
   examples/datasets/front_3d_with_improved_mat/renderings \
   --n_processes 1
   

   • The rendering results will be saved in examples/datasets/front_3d_with_improved_mat/renderings.
   • You can still customize your rendering pipeline by modifying render_dataset_improved_mat.py.
   • If you have multiple GPUs and want to render in parallel, change n_processes to your GPU number.

---

Visualization

After rendering a scene, please run the following code for 2D and 3D visualizations

python visualization/front3d/vis_front3d.py --json_file 6a0e73bc-d0c4-4a38-bfb6-e083ce05ebe9.json

Citation

Some parts of this code base is developed based on the following works. If you find our work helpful, please consider citing

@inproceedings{nie2023learning,
  title={Learning 3d scene priors with 2d supervision},
  author={Nie, Yinyu and Dai, Angela and Han, Xiaoguang and Nie{\ss}ner, Matthias},
  booktitle={Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition},
  pages={792--802},
  year={2023}
}

@article{Denninger2023, 
    doi = {10.21105/joss.04901},
    url = {https://doi.org/10.21105/joss.04901},
    year = {2023},
    publisher = {The Open Journal}, 
    volume = {8},
    number = {82},
    pages = {4901}, 
    author = {Maximilian Denninger and Dominik Winkelbauer and Martin Sundermeyer and Wout Boerdijk and Markus Knauer and Klaus H. Strobl and Matthias Humt and Rudolph Triebel},
    title = {BlenderProc2: A Procedural Pipeline for Photorealistic Rendering}, 
    journal = {Journal of Open Source Software}
} 

@InProceedings{Paschalidou2021NEURIPS,
  author = {Despoina Paschalidou and Amlan Kar and Maria Shugrina and Karsten Kreis and Andreas Geiger
  and Sanja Fidler},
  title = {ATISS: Autoregressive Transformers for Indoor Scene Synthesis},
  booktitle = {Advances in Neural Information Processing Systems (NeurIPS)},
  year = {2021}
}