cs.CVOct 26, 2026

FL4N: Feed-forward Latent Model for 4D Novel View Synthesis

Authors: Eunbeen Hong, Hyeonseo Yu, Honggyu An, Jooho Son, Hyunah Ko, Soowon Son, Chaehyun Kim, Jahyeok Koo, 

Organizations: 1KAIST AI · 2Google DeepMind

Abstract

4D novel view synthesis (NVS) aims to render dynamic scenes across viewpoints and timestamps, which requires jointly inferring 3D structure and temporal dynamics. Existing monocular feed-forward methods often rely on explicit 4D Gaussian representations, which are prone to temporal inconsistency and severe rendering artifacts. We present FL4N, the first feed-forward latent 4D NVS model. Instead of relying on explicit 4D primitives, FL4N encodes a 4D scene prior into a unified latent representation across space and time. Our core insight is that learning temporal dynamics as residuals on top of a pretrained static latent prior enables effective 4D modeling with limited dynamic training data. To this end, we introduce a lightweight dynamic encoder that leverages static scene features to disentangle object motion from camera-induced parallax. Trained solely with an image synthesis objective, FL4N achieves state-of-the-art 4D NVS quality while rendering in real time. Its learned latent representation generalizes to real-world videos and disentangles viewpoint from time.

Figures & tables

Appendix figures & tables26 assets

Supplementary material from the paper’s appendix.

Appendix

Explore similar work

CardsList
  1. Learning Global Motion with Compact Gaussians for Feed-Forward 4D Reconstruction

    May 29, 2026Mungyeom Kim, Minkyeong Jeon, Honggyu An +10Point Tracking3D Gaussian Splatting

  2. LagerNVS: Latent Geometry for Fully Neural Real-time Novel View Synthesis

    Mar 20, 2026Stanislaw Szymanowicz, Minghao Chen, Jianyuan Wang +2Novel View Synthesis3D Representation Learning