I am a Research Scientist at
NVIDIA Spatial Intelligence Lab .
I develop models for reconstructing, generating, and simulating 3D worlds from images and videos.
I received my bachelor's and PhD from Nanyang Technological University,
where I was advised by Prof. Ziwei Liu .
Publications
NVIDIA Research Whitepaper
Instant NuRec: Feed-Forward 3D Gaussian Reconstruction for Driving Scene Simulation
Jiahui Huang, Jiawei Ren , Michal Tyszkiewicz, and 12 more authors Bjoern Haefner, Michael Shelley, Xin Kang, Seung Wook Kim, Ning Xu, Qi Wu, Janick Martinez Esturo, Shengyu Huang, Nick Schneider, Laura Leal-Taixe, Zan Gojcic, Sanja Fidler
Project
Paper
Code
CVPR 2026 - Highlight
TokenGS: Decoupling 3D Gaussian Prediction from Pixels with Learnable Tokens
Jiawei Ren* , Michal Tyszkiewicz*, Jiahui Huang†, Zan Gojcic†
Project
Paper
Code
arXiv 2026
Lyra 2.0: Explorable Generative 3D Worlds
Tianchang Shen*, Sherwin Bahmani, Kai He, and 12 more authors Sangeetha Grama Srinivasan, Tianshi Cao, Jiawei Ren , Ruilong Li, Zian Wang, Nicholas Sharp, Zan Gojcic, Sanja Fidler, Jiahui Huang, Huan Ling, Jun Gao, Xuanchi Ren*
Project
Paper
Code
NVIDIA Research Whitepaper
Asset Harvester: Extracting 3D Assets from Autonomous Driving Logs for Simulation
Tianshi Cao*, Jiawei Ren* , Yuxuan Zhang, and 12 more authors Jaewoo Seo, Jiahui Huang, Shikhar Solanki, Haotian Zhang, Mingfei Guo, Haithem Turki, Muxingzi Li, Yue Zhu, Sipeng Zhang, Zan Gojcic, Sanja Fidler, Kangxue Yin*
Project
Paper
Code
ICLR 2026
Lyra: Generative 3D Scene Reconstruction via Video Diffusion Model Self-Distillation
Sherwin Bahmani, Tianchang Shen, Jiawei Ren , and 10 more authors Jiahui Huang, Yifeng Jiang, Haithem Turki, Andrea Tagliasacchi, David B. Lindell, Zan Gojcic, Sanja Fidler, Huan Ling, Jun Gao, Xuanchi Ren
Project
Paper
Code
NVIDIA Research Whitepaper 2025
ViPE: Video Pose Engine for 3D Geometric Perception
Jiahui Huang, Qunjie Zhou, Hesam Rabeti, and 12 more authors Aleksandr Korovko, Huan Ling, Xuanchi Ren, Tianchang Shen, Jun Gao, Dmitry Slepichev, Chen-Hsuan Lin, Jiawei Ren , Kevin Xie, Joydeep Biswas, Laura Leal-Taixe, Sanja Fidler
Project
Paper
Code
NeurIPS 2025
BTimer: Feed-Forward Bullet-Time Reconstruction of Dynamic Scenes from Monocular Videos
Hanxue Liang*, Jiawei Ren* , Ashkan Mirzaei*, and 8 more authors Antonio Torralba, Ziwei Liu, Igor Gilitschenski, Sanja Fidler, Cengiz Oztireli, Huan Ling, Zan Gojcic, Jiahui Huang
Project
Paper
NeurIPS 2024
L4GM: Large 4D Gaussian Reconstruction Model
Jiawei Ren , Kevin Xie, Ashkan Mirzaei, and 8 more authors Hanxue Liang, Xiaohui Zeng, Karsten Kreis, Ziwei Liu, Antonio Torralba, Sanja Fidler, Seung Wook Kim, Huan Ling
Project
Paper
Code
CVPR 2024
Move Anything with Layered Scene Diffusion
Jiawei Ren , Mengmeng Xu, Jui-Chieh Wu, and 3 more authors Ziwei Liu, Tao Xiang, Antoine Toisoul
Paper
ICLR 2024 - Oral
DreamGaussian: Generative Gaussian Splatting for Efficient 3D Content Creation
Jiaxiang Tang, Jiawei Ren , Hang Zhou, and 2 more authors Ziwei Liu, Gang Zeng
Project
Paper
Code
Demo
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NeurIPS 2023
InsActor: Instruction-driven Physics-based Characters
Jiawei Ren* , Mingyuan Zhang*, Cunjun Yu*, and 3 more authors Xiao Ma, Liang Pan, Ziwei Liu
Project
Paper
Code
Video
ICLR 2023
DiffMimic: Efficient Motion Mimicking with Differentiable Physics
Jiawei Ren* , Cunjun Yu*, Siwei Chen, and 3 more authors Xiao Ma, Liang Pan, Ziwei Liu
Project
Paper
Code
Video
CVPR 2023 - Highlight
LaserMix for Semi-Supervised LiDAR Semantic Segmentation
Lingdong Kong*, Jiawei Ren* , Liang Pan, Ziwei Liu
Project
Paper
Code
ICML 2022
Benchmarking and Analyzing Point Cloud Classification under Corruptions
Jiawei Ren , Liang Pan, Ziwei Liu
Project
Paper
Code
Demo
CVPR 2022 - Oral
Balanced MSE for Imbalanced Visual Regression
Jiawei Ren , Mingyuan Zhang, Cunjun Yu, Ziwei Liu
Project
Paper
Code
Demo
NeurIPS 2020
Balanced Meta-Softmax for Long-Tailed Visual Recognition
Jiawei Ren , Cunjun Yu, Shunan Sheng, and 4 more authors Xiao Ma, Haiyu Zhao, Shuai Yi, Hongsheng Li
Project
Paper
Code
Experience
2025 - Present
Research Scientist, NVIDIA
Spatial Intelligence Lab.
2023
Research Intern, Meta
GenAI.
2019 - 2021
Algorithm Researcher, SenseTime
X-Lab.
Education
2021 - 2025
Nanyang Technological University
Ph.D. in Computer Science. Advised by Prof. Ziwei Liu.
2015 - 2019
Nanyang Technological University
B.Eng in Electrical and Electronic Engineering.
Awards
2022
Google PhD Fellowship
2021
AI.SG PhD Fellowship
