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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 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