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

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Selected Publications

    Generalizable 4D Reconstruction

  • 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
    arXiv, 2025
    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