The World is Your Canvas: Painting Promptable Events with Reference Images, Trajectories, and Text
Authors: name: Hanlin Wang, name: Hao Ouyang, name: Qiuyu Wang, name: Yue Yu, name: Yihao Meng, name: Wen Wang, name: Ka Leong Cheng, name: Shuailei Ma, name: Qingyan Bai, name: Yixuan Li, name: Cheng Chen, name: Yanhong Zeng, name: Xing Zhu, name: Yujun Shen, name: Qifeng Chen
Organization: Ant Group

We present WorldCanvas, a framework for promptable world events that enables rich, user-directed simulation by combining text, trajectories, and reference images. Unlike text-only approaches and existing trajectory-controlled image-to-video methods, our multimodal approach combines trajectories -- encoding motion, timing, and visibility -- with natural language for semantic intent and reference images for visual grounding of object identity, enabling the generation of coherent, controllable events that include multi-agent interactions, object entry/exit, reference-guided appearance and counterintuitive events. The resulting videos demonstrate not only temporal coherence but also emergent consistency, preserving object identity and scene despite temporary disappearance. By supporting expressive world events generation, WorldCanvas advances world models from passive predictors to interactive, user-shaped simulators. Our project page is available at: https://worldcanvas.github.io/.