arXiv Computer Vision By Zhiqi Li, Yuxuan Liao, Bo Zhu

Recursive Code World Models: Building Complex Worlds through Recursive Scene Programs

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Recursive Code World Models (RCWM) present a framework that reconstructs complex 3D worlds from a single reference image by combining a Recursive Scene Program (RSP) representation with a construction solver that recursively calls itself. The RSP encodes the world as compositional scene code, while each solver invocation follows a global‑local‑global recursion: it first establishes the whole scene, then recursively reconstructs unresolved parts, and finally revisits the whole to refine composition. This approach preserves scene‑wide geometry and relationships, propagates a shared camera projection across levels, and uses a vision‑language coding agent to compare reference images with scene renders, enabling fine‑scale structure refinement and improved reconstruction over prior methods.

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