WorldReel: 4D Video Generation with Consistent Geometry and Motion Modeling

TL;DR

WorldReel is a novel 4D video generator that produces temporally and geometrically consistent videos by jointly modeling scene geometry, motion, and appearance, enabling realistic dynamic scene synthesis.

Contribution

It introduces a 4D scene representation that enforces consistency across viewpoints and time, combining synthetic and real data for robust in-the-wild video generation.

Findings

Sets new state-of-the-art in geometric consistency and motion coherence

Reduces view-time artifacts compared to existing methods

Generalizes well to in-the-wild footage

Abstract

Recent video generators achieve striking photorealism, yet remain fundamentally inconsistent in 3D. We present WorldReel, a 4D video generator that is natively spatio-temporally consistent. WorldReel jointly produces RGB frames together with 4D scene representations, including pointmaps, camera trajectory, and dense flow mapping, enabling coherent geometry and appearance modeling over time. Our explicit 4D representation enforces a single underlying scene that persists across viewpoints and dynamic content, yielding videos that remain consistent even under large non-rigid motion and significant camera movement. We train WorldReel by carefully combining synthetic and real data: synthetic data providing precise 4D supervision (geometry, motion, and camera), while real videos contribute visual diversity and realism. This blend allows WorldReel to generalize to in-the-wild footage while preserving strong geometric fidelity. Extensive experiments demonstrate that WorldReel sets a new state-of-the-art for consistent video generation with dynamic scenes and moving cameras, improving metrics of geometric consistency, motion coherence, and reducing view-time artifacts over competing methods. We believe that WorldReel brings video generation closer to 4D-consistent world modeling, where agents can render, interact, and reason about scenes through a single and stable spatiotemporal representation.