Jiawei Ren

jiawei011 AT e.ntu.edu.sg

I am a Research Scientist at NVIDIA Spatial Intelligence Lab led by Prof. Sanja Fidler. I received my bachelor's and PhD from Nanyang Technological University. My PhD advisor is Prof. Ziwei Liu.

My current research interest is in scalable dynamic 3D synthesis.

Github  /  Google Scholar

profile photo
Selected Publications

    Generative 3D/4D Reconstruction

  • TokenGS: Decoupling 3D Gaussian Prediction from Pixels with Learnable Tokens
    Jiawei Ren*, Michal Tyszkiewicz*, Jiahui Huang†, Zan Gojcic†
    CVPR, 2026   (Highlight)
    Arxiv / Code / Project Page

  • Lyra 2.0: Explorable Generative 3D Worlds
    Tianchang Shen*, Sherwin Bahmani, Kai He, 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*
    arXiv, 2026
    Arxiv / Code / Project Page

  • Asset Harvester: Extracting 3D Assets from Autonomous Driving Logs for Simulation
    Tianshi Cao*, Jiawei Ren*, Yuxuan Zhang, Jaewoo Seo, Jiahui Huang, Shikhar Solanki, Haotian Zhang, Mingfei Guo, Haithem Turki, Muxingzi Li, Yue Zhu, Sipeng Zhang, Zan Gojcic, Sanja Fidler, Kangxue Yin*
    arXiv, 2026
    Arxiv / Code / Project Page

  • Lyra: Generative 3D Scene Reconstruction via Video Diffusion Model Self-Distillation
    Sherwin Bahmani, Tianchang Shen, Jiawei Ren, Jiahui Huang, Yifeng Jiang, Haithem Turki, Andrea Tagliasacchi, David B. Lindell, Zan Gojcic, Sanja Fidler, Huan Ling, Jun Gao, Xuanchi Ren
    ICLR, 2026
    Arxiv / Code / Project Page

  • BTimer: Feed-Forward Bullet-Time Reconstruction of Dynamic Scenes from Monocular Videos
    Hanxue Liang*, Jiawei Ren*, Ashkan Mirzaei*, Antonio Torralba, Ziwei Liu, Igor Gilitschenski, Sanja Fidler, Sanja Fidler, Cengiz Oztireli, Huan Ling, Zan Gojcic, Jiahui Huang
    NeurIPS, 2025
    Arxiv / Project Page

  • L4GM: Large 4D Gaussian Reconstruction Model
    Jiawei Ren, Kevin Xie, Ashkan Mirzaei, Hanxue Liang, Xiaohui Zeng, Karsten Kreis, Ziwei Liu, Antonio Torralba, Sanja Fidler, Seung Wook Kim, Huan Ling
    NeurIPS, 2024
    Arxiv / Code / Project Page

    • Simulated Motion Synthesis

  • InsActor: Instruction-driven Physics-based Characters
    Jiawei Ren*, Mingyuan Zhang*, Cunjun Yu*, Xiao Ma, Liang Pan, Ziwei Liu
    NeurIPS, 2023
    Arxiv / Code / Project Page / Video

  • DiffMimic: Efficient Motion Mimicking with Differentiable Physics
    Jiawei Ren*, Cunjun Yu*, Siwei Chen, Xiao Ma, Liang Pan, Ziwei Liu
    ICLR, 2023
    Arxiv / Code / Project Page / Demo / Video

    • Scalable 3D Perception

  • LaserMix for Semi-Supervised LiDAR Semantic Segmentation
    Lingdong Kong*, Jiawei Ren*, Liang Pan, Ziwei Liu
    CVPR, 2023   (Highlight)
    Arxiv / Code / Project Page

  • Benchmarking and Analyzing Point Cloud Classification under Corruptions
    Jiawei Ren, Liang Pan, Ziwei Liu
    ICML, 2022
    Arxiv / Code / Project Page/ Talk/ Demo/ Challenge

  • Balanced MSE for Imbalanced Visual Regression
    Jiawei Ren, Mingyuan Zhang, Cunjun Yu, Ziwei Liu
    CVPR, 2022   (Oral)
    Arxiv / Code / Project Page / Talk / Demo / Tutorial