1. Guided Image Filtering for Interactive High-Quality Global Illumination;Bauszat Pablo;CGF,2011
2. Gradient-domain path reusing
3. Nir Benty Kai-Hwa Yao Lucy Chen Tim Foley Matthew Oakes Conor Lavelle and Chris Wyman. 2019. The Falcor Rendering Framework. https://github.com/NVIDIAGameWorks/Falcor Nir Benty Kai-Hwa Yao Lucy Chen Tim Foley Matthew Oakes Conor Lavelle and Chris Wyman. 2019. The Falcor Rendering Framework. https://github.com/NVIDIAGameWorks/Falcor