# “We are more concerned about the risks of moving too slowly”: Epic get more specific about genAI use in Unreal Engine and Fortnite development

- URL: https://talkfuse.com/story/we-are-more-concerned-about-the-risks-of-moving-too-slowly-epic-get-more-specific-about-genai-use-in-unreal-engine-and-fortnite-development/
- Published: 2026-10-28T16:49:39+00:00
- Updated: 2026-11-04T04:21:48+00:00
- Original publisher: Rock Paper Shotgun
- Original article: https://www.rockpapershotgun.com/we-are-more-concerned-about-the-risks-of-moving-too-slowly-epic-get-more-specific-about-genai-use-in-unreal-engine-and-fortnite-development
- Topics: AI, Entertainment, Gaming, Government, Offbeat, Politics, Technology, Weird & Viral

## Key points

- Epic is using Claude Code and Codex in development.
- AI helped complete a D3D12 rewrite in about a week.
- The company says it fears moving too slowly on AI.

## Summary

Epic Games says it is using generative AI tools, including Claude Code and Codex, across Unreal Engine and Fortnite development. Executive vice-president Marcus Wassmer said the tools have helped speed up engineering work and reduce bugs, as Epic sees the risk of adopting AI too slowly as greater than the risk of scepticism about it.

Wassmer cited near-elimination of longstanding non-deterministic cooking bugs and smaller patches after shader-compression work. He said a rewrite of part of the D3D12 rendering layer took about a week, compared with his estimate of three to six weeks for one engineer, and brought CPU-time and reliability gains. Fortnite has also added automated PC stability monitoring, issue analysis and fixes; engineers guide AI-assisted coding rather than generating the engine in one step.

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Summarised by TalkFuse (https://talkfuse.com/). Quote the original publisher for the reporting and link this page for the summary and discussion.