Excited to share HoloWorld, a unified framework for indoor-outdoor 3D urban world generation. HoloWorld maintains a continuously updated cross-scale world context, enabling coherent generation from city-scale planning to individual building interiors while preserving cross-block continuity and explicit indoor-outdoor correspondence.</p>\n<p>Project page: <a href=\"https://huangxb326.github.io/HoloWorld/\" rel=\"nofollow\">https://huangxb326.github.io/HoloWorld/</a></p>\n","updatedAt":"2026-09-07T07:33:54.006Z","author":{"_id":"6723222eaa100cd623ff7d91","avatarUrl":"https://cdn-avatars.huggingface.co/v1/production/uploads/no-auth/l7pOmDX3uWtb_nRGk_yk3.png","fullname":"xb1n","name":"xB1n","type":"user","isPro":false,"isHf":false,"isHfAdmin":false,"isMod":false,"isUserFollowing":false}},"numEdits":0,"identifiedLanguage":{"language":"en","probability":0.731042742729187},"editors":["xB1n"],"editorAvatarUrls":["https://cdn-avatars.huggingface.co/v1/production/uploads/no-auth/l7pOmDX3uWtb_nRGk_yk3.png"],"reactions":[],"isReport":false}}],"primaryEmailConfirmed":false,"paper":{"id":"2608.05879","authors":[{"_id":"6a9aff74ec9341424a87f5b8","name":"Xiaobin Huang","hidden":false},{"_id":"6a9aff74ec9341424a87f5b9","name":"Zilong Huang","hidden":false},{"_id":"6a9aff74ec9341424a87f5ba","name":"Yang Luo","hidden":false},{"_id":"6a9aff74ec9341424a87f5bb","name":"Hongchao Fan","hidden":false},{"_id":"6a9aff74ec9341424a87f5bc","name":"Yiping Chen","hidden":false},{"_id":"6a9aff74ec9341424a87f5bd","name":"Ting Han","hidden":false}],"publishedAt":"2026-08-29T00:00:00.000Z","submittedOnDailyAt":"2026-09-07T00:00:00.000Z","title":"To See a World in a Living Context: Unified Indoor-Outdoor Urban World Generation","submittedOnDailyBy":{"_id":"6723222eaa100cd623ff7d91","avatarUrl":"https://cdn-avatars.huggingface.co/v1/production/uploads/no-auth/l7pOmDX3uWtb_nRGk_yk3.png","isPro":false,"fullname":"xb1n","user":"xB1n","type":"user","name":"xB1n"},"summary":"Text-driven 3D generation has advanced rapidly in creating large-scale outdoor environments and detailed indoor scenes, but these domains are usually synthesized independently, lacking the correspondence required for a coherent urban world. We present HoloWorld, a unified indoor-outdoor urban world generation framework built on a continuously updated cross-scale world context. Initializing from a user description, HoloWorld progressively represents and updates the diverse world information, from city-scale planning to individual buildings, allowing generated interiors to maintain explicit correspondence with their associated exterior buildings. Conditioned on the evolving context and previously generated neighboring blocks, HoloWorld autoregressively generates urban exteriors with consistent spatial organization and visual identity across blocks. The generated exterior representations are further grounded in 3D building instances and footprints, enabling building-specific indoor generation with geometry-constrained layouts and inherited appearance characteristics. To our knowledge, HoloWorld is the first framework to unify indoor and outdoor generation within a coherent 3D urban world. Extensive experiments demonstrate that HoloWorld achieves superior urban exterior generation performance, improving the average AQS score over the SOTA by 7.68\\% and obtaining the highest average RDR score, while maintaining strong building-level indoor-outdoor correspondence and cross-block continuity within a unified 3D urban world. Our project page: https://huangxb326.github.io/HoloWorld/.","upvotes":2,"discussionId":"6a9aff74ec9341424a87f5be","projectPage":"https://huangxb326.github.io/HoloWorld/","ai_summary":"HoloWorld unifies indoor and outdoor 3D urban generation through a continuously updated cross-scale context that ensures coherent building-level correspondence and cross-block continuity.","ai_keywords":["text-driven 3D generation","cross-scale world context","autoregressive generation","3D building instances","geometry-constrained layouts","indoor-outdoor correspondence"],"ai_summary_model":"thinkingmachines/Inkling-Small"},"canReadDatabase":false,"canManagePapers":false,"canSubmit":false,"hasHfLevelAccess":false,"upvoted":false,"upvoters":[{"_id":"6487e158f675b4a7867f45fa","avatarUrl":"https://cdn-avatars.huggingface.co/v1/production/uploads/6487e158f675b4a7867f45fa/J0sls6zZ682o-SH7iQs7B.jpeg","isPro":false,"fullname":"Zilong Huang","user":"SereinH","type":"user"},{"_id":"6723222eaa100cd623ff7d91","avatarUrl":"https://cdn-avatars.huggingface.co/v1/production/uploads/no-auth/l7pOmDX3uWtb_nRGk_yk3.png","isPro":false,"fullname":"xb1n","user":"xB1n","type":"user"}],"acceptLanguages":["en"],"dailyPaperRank":0,"markdownContentUrl":"https://huggingface.co/buckets/huggingchat/papers-content/resolve/2608/2608.05879.md","query":{}}">
To See a World in a Living Context: Unified Indoor-Outdoor Urban World Generation
Published on Aug 29
· Submitted by xb1n on Sep 7 Abstract
HoloWorld unifies indoor and outdoor 3D urban generation through a continuously updated cross-scale context that ensures coherent building-level correspondence and cross-block continuity.
Text-driven 3D generation has advanced rapidly in creating large-scale outdoor environments and detailed indoor scenes, but these domains are usually synthesized independently, lacking the correspondence required for a coherent urban world. We present HoloWorld, a unified indoor-outdoor urban world generation framework built on a continuously updated cross-scale world context. Initializing from a user description, HoloWorld progressively represents and updates the diverse world information, from city-scale planning to individual buildings, allowing generated interiors to maintain explicit correspondence with their associated exterior buildings. Conditioned on the evolving context and previously generated neighboring blocks, HoloWorld autoregressively generates urban exteriors with consistent spatial organization and visual identity across blocks. The generated exterior representations are further grounded in 3D building instances and footprints, enabling building-specific indoor generation with geometry-constrained layouts and inherited appearance characteristics. To our knowledge, HoloWorld is the first framework to unify indoor and outdoor generation within a coherent 3D urban world. Extensive experiments demonstrate that HoloWorld achieves superior urban exterior generation performance, improving the average AQS score over the SOTA by 7.68\% and obtaining the highest average RDR score, while maintaining strong building-level indoor-outdoor correspondence and cross-block continuity within a unified 3D urban world. Our project page: https://huangxb326.github.io/HoloWorld/.
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Excited to share HoloWorld, a unified framework for indoor-outdoor 3D urban world generation. HoloWorld maintains a continuously updated cross-scale world context, enabling coherent generation from city-scale planning to individual building interiors while preserving cross-block continuity and explicit indoor-outdoor correspondence.
Project page: https://huangxb326.github.io/HoloWorld/
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Cite arxiv.org/abs/2608.05879 in a model README.md to link it from this page.
Cite arxiv.org/abs/2608.05879 in a dataset README.md to link it from this page.
Cite arxiv.org/abs/2608.05879 in a Space README.md to link it from this page.
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