# UE5.4.0へ移行後に一部既存レベルが開けない

**URL:** <https://forums.unrealengine.com/t/ue5-4-0/1809763>\
**Category:** 日本語 (Japanese)\
**Tags:** unreal-engine, crash, question\
**Created:** [April 18, 2024, 3:27pm UTC](https://forums.unrealengine.com/t/ue5-4-0/1809763 "2024-04-18T15:27:07Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![oyg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@oyg](https://forums.unrealengine.com/u/oyg)\
**Post date:** [April 19, 2024, 2:31am UTC](https://forums.unrealengine.com/t/ue5-4-0/1809763/2 "2024-04-19T02:31:16Z")

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> [@Unreal Engine 5.4 Preview](https://forums.unrealengine.com/t/unreal-engine-5-4-preview/1763516):
>
> Download Unreal Engine 5.4 Preview from the Epic Games launcher, [GitHub](https://github.com/EpicGames), or for [Linux](https://www.unrealengine.com/linux)! Unreal Engine 5.4 Preview 1 sees improvements to overall performance and workflows to help get you to those final pixels even faster. With many developers targeting 60 Hz experiences, we’ve invested significant effort into improving rendering performance in UE 5.4. Nanite continues to receive enhancements. An Experimental new Tessellation feature enables fine details…

> Keep in mind, preview releases are not fully quality tested, are still under heavy active development, and should be considered as unstable until the final release. We recommend that developers make a copy of their projects for testing these builds, not to convert their projects.

Google 翻訳  
プレビュー リリースは十分な品質テストが行​​われておらず、現在も活発な開発が行われているため、最終リリースまでは不安定であると考えてください。開発者は、プロジェクトを変換するのではなく、これらのビルドをテストするためにプロジェクトのコピーを作成することをお勧めします。

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