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nvdiffmodeling

Teaser image

Differentiable rasterization applied to 3D model simplification tasks, as described in the paper:

Appearance-Driven Automatic 3D Model Simplification
Jon Hasselgren, Jacob Munkberg, Jaakko Lehtinen, Miika Aittala and Samuli Laine
https://research.nvidia.com/publication/2021-04_Appearance-Driven-Automatic-3D
https://arxiv.org/abs/2104.03989

License

Copyright © 2021, NVIDIA Corporation. All rights reserved.

This work is made available under the Nvidia Source Code License.

For business inquiries, please visit our website and submit the form: NVIDIA Research Licensing

Citation

@inproceedings{Hasselgren2021,
  title     = {Appearance-Driven Automatic 3D Model Simplification},
  author    = {Jon Hasselgren and Jacob Munkberg and Jaakko Lehtinen and Miika Aittala and Samuli Laine},
  booktitle = {Eurographics Symposium on Rendering},
  year      = {2021}
}

Installation

Requirements:

Tested in Anaconda3 with Python 3.6 and PyTorch 1.8.

One time setup (Windows)

  1. Install Microsoft Visual Studio 2019+ with Microsoft Visual C++.
  2. Install Cuda 10.2 or above. Note: Install CUDA toolkit from https://developer.nvidia.com/cuda-toolkit (not through anaconda)
  3. Install the appropriate version of PyTorch compatible with the installed Cuda toolkit. Below is an example with Cuda 11.1
conda create -n dmodel python=3.6
activate dmodel
conda install pytorch torchvision torchaudio cudatoolkit=11.1 -c pytorch -c conda-forge
conda install imageio
pip install PyOpenGL glfw
  1. Install nvdiffrast in the dmodel conda env. Follow the installation instructions.

Every new command prompt

activate dmodel

Examples

Sphere to cow example:

python train.py --config configs/spot.json

The results will be stored in the out folder. The Spot model was created and released into the public domain by Keenan Crane.

Additional assets can be downloaded here [205MB]. Unzip and place the subfolders in the project data folder, e.g., data\skull. All assets are copyright of their respective authors, see included license files for further details.

Included examples

  • skull.json - Joint normal map and shape optimization on a skull
  • ewer.json - Ewer model from a reduced mesh as initial guess
  • gardenina.json - Aggregate geometry example
  • hibiscus.json - Aggregate geometry example
  • dancer_brushed_gold_64.json - LOD example, trained against a supersampled reference
  • dancer_displacement.json - Joint shape, normal map, and displacement map example

The json files that end in _paper.json are configs with the settings used for the results in the paper. They take longer and require a GPU with sufficient memory.

Server usage (through Docker)

  • Build docker image (run the command from the code root folder). docker build -f docker/Dockerfile -t diffmod:v1 . Requires a driver that supports Cuda 10.1 or newer.

  • Start an interactive docker container: docker run --gpus device=0 -it --rm -v /raid:/raid -it diffmod:v1 bash

  • Detached docker: docker run --gpus device=1 -d -v /raid:/raid -w=[path to the code] diffmod:v1 python train.py --config configs/spot.json