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                  Ziyi Zhang  张梓毅
                 
                
                I am a fourth year PhD student in the
                Realistic Graphics Lab at
                EPFL, adviced by
                Prof. Wenzel Jakob.
                 
                
                I'm interested in physical light transport simulation and its differentiation.
                During my PhD, I have had the opportunity to work as an intern with NVIDIA and Google.
                Before that, I obtained my bachelor's degree from NYU where I had the privilege of working with Prof. Daniele Panozzo.
                 
                
                  Email  / 
                  Google Scholar  / 
                  Github  / 
                  Bluesky
                 
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                Many-Worlds Inverse Rendering
                 
                Ziyi Zhang,
                Nicolas Roussel,
                Wenzel Jakob
                 
                ACM SIGGRAPH Asia, 2025
                 
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                Simple and efficient geometry optimization by differentiating non-interacting superposition of conflicting possibilities ("worlds").
                 
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                Radiance Surfaces: Optimizing Surface Representations with a 5D Radiance Field Loss
                 
                Ziyi Zhang,
                Nicolas Roussel,
                Thomas Müller,
                Tizian Zeltner,
                Merlin Nimier-David,
                Fabrice Rousselle,
                Wenzel Jakob
                 
                ACM SIGGRAPH, 2025
                 
                project page
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                code
                
                
                Optimizing a distribution of surfaces without volume rendering.
                 
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                A Simple Approach to Differentiable Rendering of SDFs
                 
                Zichen Wang,
                Xi Deng,
                Ziyi Zhang,
                Wenzel Jakob,
                Steve Marschner
                 
                ACM SIGGRAPH Asia, 2024
                 
                project page
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                SDF differentiation made simple.
                 
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                Projective Sampling for Differentiable Rendering of Geometry
                 
                Ziyi Zhang,
                Nicolas Roussel,
                Wenzel Jakob
                 
                ACM SIGGRAPH Asia, 2023
                 
                project page
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                Compute gradients of geometry in physically-based rendering -- from theory to a practical Monte Carlo algorithm.
                 
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                4D Force Detection of Cell Adhesion and Contractility
                 
                Nafsika Chala,
                Xinyu Zhang,
                Tomaso Zambelli,
                Ziyi Zhang,
                Teseo Schneider,
                Daniele Panozzo,
                Dimos Poulikakos,
                Aldo Ferrari
                 
                Nanoletters, 2023
                 
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                code
                
                
                Traction force microscopy in 3D.
                 
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                Rear traction forces drive adherent tissue migration in vivo
                 
                Naoya Yamaguchi,
                Ziyi Zhang,
                Teseo Schneider,
                Biran Wang,
                Daniele Panozzo,
                Holger Knaut
                 
                Nature Cell Biology, 2022
                 
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                Optical tracking of bleached pattern for cellular traction force microscopy.
                 
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                Bijective and Coarse High-Order Tetrahedral Meshes
                 
                Zhongshi Jiang,
                Ziyi Zhang,
                Yixin Hu,
                Teseo Schneider,
                Denis Zorin,
                Daniele Panozzo
                 
                ACM SIGGRAPH, 2021
                 
                project page
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                Robust Coarse Curved TetMesh Generation.
                 
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