About Me

Hi, this is Mandy!

I am a Postdoctoral Researcher at Yale University, working with Prof. Julie Dorsey and Prof. Holly Rushmeier. Previously, I worked with Prof. Wenzel Jakob at École Polytechnique Fédérale de Lausanne (EPFL). I earned my PhD in Computer Science from Cornell University in 2022, advised by Prof. Steve Marschner. Before pursuing graduate studies, I received my Bachelor of Science in Applied Mathematics from University of California, Los Angeles (UCLA) in 2016, where I worked with Prof. Chenfanfu Jiang, and Prof. Joseph Teran.

My research bridges computer graphics, optics, and machine learning. I develop physics-based and neural methods for multiscale simulation and inverse rendering, combining physical accuracy with the flexibility and scalability of learning-based methods for practical and scientific impact.

Outside of work, I enjoy rock climbing and playing the drums.

News

  • Oct 2025: Invited talk at Wesleyan University.
  • Sep 2025: Serving on the paper committees for SIGGRAPH 2026 and Eurographics 2026.
  • Sep 2025: Invited talk at Adobe Research.
  • Aug 2025: “Spectral Reconstruction with Uncertainty Quantification via Differentiable Rendering and Null-Space Sampling” accepted to SIGGRAPH Asia 2025.
  • Jun 2025: Invited talks at Peking University, Tsinghua University, and Beijing Normal University.
  • May 2025: Congrats to Rachel Liang on successfully defending her master’s thesis!
  • Apr 2025: Invited talk at the New England Symposium on Graphics, MIT.
  • Mar 2025: “Predicting Fabric Appearance Through Thread Scattering and Inversion” accepted to SIGGRAPH 2025.
  • Jan 2025: Guest instructor for CPCS 479/579 – Advanced Topics in Computer Graphics (Spring 2025).
  • Nov 2024: Serving on program committees for SIGGRAPH 2025 and EGSR 2025.

Publications

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Spectral Reconstruction with Uncertainty Quantification via Differentiable Rendering and Null-Space Sampling
Mengqi (Mandy) Xia, Bai Xue, Rachel Liang, Holly Rushmeier
ACM SIGGRAPH Asia 2025 (Conference Track)
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Predicting Fabric Appearance Through Thread Scattering and Inversion
Mengqi (Mandy) Xia, Zhaoyang Zhang, Sumit Chaturvedi, Yutong Yi, Rundong Wu, Holly Rushmeier, Julie Dorsey
ACM Transactions on Graphics (Proceedings of SIGGRAPH 2025)
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Retrieving Fine-Scale Leaf and Soil Spectral Properties from Canopy Reflectance Using Differentiable 3D Radiative Transfer
Jianbo Qi, Jifan Wei, Mengqi (Mandy) Xia, Donghui Xie
Submitted to Remote Sensing of Environment, 2025
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A Practical Wave Optics Reflection Model for Hair and Fur
Mengqi (Mandy) Xia, Bruce Walter, Christophe Hery, Olivier Maury, Eric Michielssen, Steve Marschner
ACM Transactions on Graphics (Proceedings of SIGGRAPH 2023)
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A Full-Wave Reference Simulator for Computing Surface Reflectance
Yunchen Yu, Mengqi (Mandy) Xia, Bruce Walter, Eric Michielssen, Steve Marschner
ACM Transactions on Graphics (Proceedings of SIGGRAPH 2023)
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Iridescent Water Droplets Beyond Mie Scattering
Mengqi (Mandy) Xia, Bruce Walter, Steve Marschner
Computer Graphics Forum (Proceedings of Eurographics Symposium on Rendering 2023)
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A Hyperspectral Space of Skin Tones for Inverse Rendering of Biophysical Skin Properties
Carlos Aliaga, Mengqi (Mandy) Xia, Hao Xie, Adrian Jarabo, Gustav Braun, Christophe Hery
Computer Graphics Forum (Proceedings of Eurographics Symposium on Rendering 2023)
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Gaussian Product Sampling for Rendering Layered Materials
Mengqi (Mandy) Xia, Bruce Walter, Christophe Hery, Steve Marschner
Computer Graphics Forum 39:1 (February 2020), presented at Eurographics 2021
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An Efficient Primal-Dual Method for the Obstacle Problem
Dominique Zosso, Braxton Osting, Mengqi (Mandy) Xia, Stanley J. Osher
Journal of Scientific Computing, 2017

Teaching Experience

CPCS 479/579 Advanced Topics in Computer Graphics

Spring 2025
Guest Instructor, Yale University

CS 5625 Interactive Computer Graphics

Spring 2019
Teaching Assistant, Cornell University

CS 4620 Introduction to Computer Graphics

Spring 2018
Teaching Assistant, Cornell University

CS 1112 Introduction to Computing Using MATLAB

Fall 2016, Spring 2017
Teaching Assistant, Cornell University

Industry Research Experience

Facebook Reality Labs

Summer 2020, 2021
Research intern

Pixar Animation Studios

Summer 2018
Research intern

Awards and Services

Selected for WiGRAPH Rising Stars

2022, 2023
A two-year program of mentorship and workshops co-located with SIGGRAPH 2022 and 2023

Selected for EECS Rising Stars, UC Berkeley

November 9-10, 2020
An academic career workshop for women in EECS

SIGGRAPH 2025, 2026, Eurographics 2026, EGSR 2025, Eurographics 2025 Short Paper, CAD/Graphics 2025

Committee member

SIGGRAPH, SIGGRAPH Asia, Eurographics, Eurographics Symposium on Rendering, Pacific Graphics, Transactions on Graphics, Computer Graphics Forum, IEEE Transactions on Visualization and Computer Graphics, Journal of Computer Graphics Techniques, Computers & Graphics, The Visual Computer, Journal of Quantitative Spectroscopy and Radiative Transfer

Reviewer