WorldPlay: Towards Long-Term Geometric Consistency for Real-Time Interactive World Modeling

TL;DR

WorldPlay introduces a real-time streaming video diffusion model that maintains long-term geometric consistency for interactive world modeling, balancing speed and memory through innovative memory and control techniques.

Contribution

The paper presents novel methods for long-term geometric consistency and real-time performance in interactive world modeling, including a dual action representation, reconstituted context memory, and context forcing distillation.

Findings

Generates 720p streaming video at 24 FPS with high consistency

Outperforms existing methods in long-term geometric accuracy

Demonstrates strong generalization across diverse scenes

Abstract

This paper presents WorldPlay, a streaming video diffusion model that enables real-time, interactive world modeling with long-term geometric consistency, resolving the trade-off between speed and memory that limits current methods. WorldPlay draws power from three key innovations. 1) We use a Dual Action Representation to enable robust action control in response to the user's keyboard and mouse inputs. 2) To enforce long-term consistency, our Reconstituted Context Memory dynamically rebuilds context from past frames and uses temporal reframing to keep geometrically important but long-past frames accessible, effectively alleviating memory attenuation. 3) We also propose Context Forcing, a novel distillation method designed for memory-aware model. Aligning memory context between the teacher and student preserves the student's capacity to use long-range information, enabling real-time speeds while preventing error drift. Taken together, WorldPlay generates long-horizon streaming 720p video at 24 FPS with superior consistency, comparing favorably with existing techniques and showing strong generalization across diverse scenes. Project page and online demo can be found: https://3d-models.hunyuan.tencent.com/world/ and https://3d.hunyuan.tencent.com/sceneTo3D.