Using Claude Code and Codex to write and refactor code for Unreal Engine, Fortnite and other Epic projects, with engineers prompting AI and refining output rather than hand-writing core code
Reported: AI rewrote a chunk of the D3D12 rendering layer in about a week versus 3-6 weeks for one engineer, and essentially eliminated non-deterministic asset-cooking bugs that had plagued Unreal for nearly a decade