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UnrealLLM: Towards Highly Controllable and Interactable 3D Scene Generation by LLM-powered Procedural Content Generation

  • Song Tang
  • , Kaiyong Zhao
  • , Lei Wang
  • , Yuliang Li
  • , Xuebo Liu
  • , Junyi Zou
  • , Qiang Wang*
  • , Xiaowen Chu*
  • *Corresponding author for this work
  • Hong Kong University of Science and Technology
  • XGRIDS
  • Harbin Institute of Technology Shenzhen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The creation of high-quality 3D scenes is essential for applications like video games and simulations, yet automating this process while retaining the benefits of Procedural Content Generation (PCG) remains challenging. In this paper, we introduce UnrealLLM, a novel multi-agent framework that connects natural language descriptions with the professional PCG system (Unreal Engine 5) to automate scene generation. UnrealLLM constructs a comprehensive knowledge base to translate text into executable PCG blueprints and a diverse asset library that guarantees high-quality scene generation. Additionally, it also introduces a text-based blueprint system with a spline-based control mechanism for geometric arrangement, enabling natural language interaction and enhancing interactivity in 3D environments using UE5's advanced capabilities. Through extensive experiments, we show that UnrealLLM achieves competitive performance in technical metrics and aesthetic quality, offering unique advantages in generation scale and interactivity. This work makes a valuable contribution to automated 3D content creation, benefiting both novice users and professional designers.

Original languageEnglish
Title of host publicationFindings of the Association for Computational Linguistics
Subtitle of host publicationACL 2025
EditorsWanxiang Che, Joyce Nabende, Ekaterina Shutova, Mohammad Taher Pilehvar
PublisherAssociation for Computational Linguistics (ACL)
Pages19417-19435
Number of pages19
ISBN (Electronic)9798891762565
DOIs
StatePublished - 2025
Externally publishedYes
Event63rd Annual Meeting of the Association for Computational Linguistics, ACL 2025 - Vienna, Austria
Duration: 27 Jul 20251 Aug 2025

Publication series

NameProceedings of the Annual Meeting of the Association for Computational Linguistics
ISSN (Print)0736-587X

Conference

Conference63rd Annual Meeting of the Association for Computational Linguistics, ACL 2025
Country/TerritoryAustria
CityVienna
Period27/07/251/08/25

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