MoReGen: Multi-Agent Motion-Reasoning Engine for Code-based Text-to-Video Synthesis
This addresses the problem of physical coherence in text-to-video generation for applications requiring realistic motion, though it is incremental in combining existing components for a new domain.
The paper tackles the challenge of generating physically accurate videos from text by introducing MoReGen, a framework that integrates multi-agent LLMs and physics simulators, and shows that existing models struggle with physical validity while MoReGen provides a principled solution.
While text-to-video (T2V) generation has achieved remarkable progress in photorealism, generating intent-aligned videos that faithfully obey physics principles remains a core challenge. In this work, we systematically study Newtonian motion-controlled text-to-video generation and evaluation, emphasizing physical precision and motion coherence. We introduce MoReGen, a motion-aware, physics-grounded T2V framework that integrates multi-agent LLMs, physics simulators, and renderers to generate reproducible, physically accurate videos from text prompts in the code domain. To quantitatively assess physical validity, we propose object-trajectory correspondence as a direct evaluation metric and present MoReSet, a benchmark of 1,275 human-annotated videos spanning nine classes of Newtonian phenomena with scene descriptions, spatiotemporal relations, and ground-truth trajectories. Using MoReSet, we conduct experiments on existing T2V models, evaluating their physical validity through both our MoRe metrics and existing physics-based evaluators. Our results reveal that state-of-the-art models struggle to maintain physical validity, while MoReGen establishes a principled direction toward physically coherent video synthesis.