— First Year CS PhD · Cornell Tech

Yiwen (Evan) Zhang

World Models & 3D Reconstruction

I am a first year PhD student at Cornell University, Cornell Tech, NYC, advised by Professor Hadar Averbuch-Elor. My interests are in world models and 3D reconstruction. Previously, I received my B.A. in Computer Science at Cornell University.

Yiwen (Evan) Zhang

Publications

§ 01

  1. MosaiChunk: Compositing Spatio-Temporal Memory for Autoregressive Video Generation

    Yiwen Zhang, Haocheng Xi, Michael Tian-Yue Liu, Alexei A. Efros, Hadar Averbuch-Elor, Qianqian Wang†, Haiwen Feng†

    arXiv 2026 ·Website ·arXiv ·Code ·Weights ·Data

  2. Video DeltaNet: Near-Lossless Hybrid Attention for Video Models

    Haocheng Xi, Yiming Xie, Hexu Zhao, Yiwen Zhang, Michael Tian-Yue Liu, Thomas Creavin, Kurt Keutzer, Xiuyu Li, Zhaoyang Lv, Chenfeng Xu, Haiwen Feng

    arXiv 2026 ·Website ·arXiv ·Code ·Weights

  3. Emergent Extreme-View Geometry in 3D Foundation Models

    Emergent Extreme-View Geometry in 3D Foundation Models

    Yiwen Zhang, Joseph Tung, Ruojin Cai, David Fouhey, Hadar Averbuch-Elor

    CVPR 2026 ·Website ·Code ·Data

Projects

§ 02
  1. ARSplat: Mobile AR for Time-Lapse Tour

    ARSplat: Mobile AR for Time-Lapse Tour

    Yiwen Zhang, Nhan Tran, Abe Davis

    Research Project

    Leveraging iPhone's LiDAR camera, this project builds an App that captures and aligns multiple scenes of a changing environment, then visualizes the time-lapse.

  2. Auto-Riggable Gaussian Characters

    Auto-Riggable Gaussian Characters

    Course Project·GitHub

    Leveraging dynamic gaussian splats with local rigidity constraints, this project decomposes moving subjects into animation-ready rigs.

  3. MLS-MPM and CPIC

    MLS-MPM and CPIC

    Course Project·GitHub

    This project implements the Moving Least Squared Material Point Method, CPIC, various materials, and mesh extraction in 2D and 3D.

  4. Compositional Splatting for Construction Sites

    Compositional Splatting for Construction Sites

    Course Project·Project Paper

    Leveraging gaussian splats for digital twin capture on construction sites, this project aims to simulate realistic construction environments and record the construction processes.

  5. Zelda: Catch the Koroks

    Zelda: Catch the Koroks

    Course Project ·Project Paper ·Project Video

    This project uses rasterization to render a mini game that is inspired by Zelda. Customized shaders are created to simulate grass, trees, terrain, etc.

  6. Apple Is All You Need

    Apple Is All You Need

    Course Project·Project Paper

    This project implements a raytracer that renders a scene exclusively composed of apples. Various graphics techniques are used including constructive solid geometry, Fresnel refraction, defocus blur, etc.

Teaching

§ 03