Differentiable Monte Carlo Ray Tracing through Edge Sampling

@article{li2018differentiable,
  title={Differentiable monte carlo ray tracing through edge sampling},
  author={Li, Tzu-Mao and Aittala, Miika and Durand, Fr{\'e}do and Lehtinen, Jaakko},
  journal={ACM Transactions on Graphics (TOG)},
  volume={37},
  number={6},
  pages={1--11},
  year={2018},
  publisher={ACM New York, NY, USA}
}