If you are using these features, you will need to perform the updates described in the Mandatory Updates section to bring your UE4 projects into UE5 successfully. This page covers mandatory updates and other noteworthy system changes, such as system deprecations and replacements. Nanite and Lumen will require some of work to get graphics-centric projects looking the same as they did in UE4, and heavily physics-based projects that have not already switched to Chaos will need some configuration and Asset modification. Among the largest systemic changes are Nanite, Lumen, and Chaos. However, certain new or upgraded features benefit from, or even require, some manual updates to operate properly in UE5 and take advantage of its full capabilities. Once the conversion process is complete, most projects will be ready to build and run in UE5 without further action. Once you update a project to a newer version of Unreal Engine, you won't be able to open it in an older version.

Skip the conversion, which attempts to open the project as-is.Ĭonvert in-place, which attempts to convert the existing project rather than make a copy of it. If you click More Options on this dialog, you can choose to either: Then, select the project you want to upgrade and click Open.Ĭlick the Open a Copy button to upgrade a separate copy of your project, leaving the original unchanged. If UE5 is already running, from the main menu, go to File > Open Project from the main menu.

To begin, open UE5 from the Epic Games Launcher. Although there have been significant changes to the engine, the built-in conversion process handles most of the work involved in migration without requiring any user action. Unreal Engine 5 (UE5) introduces a series of changes, upgrades, and new features to the systems that made up Unreal Engine 4 (UE4). This guide describes how to upgrade your Unreal Engine 4 projects to Unreal Engine 5 (UE5).

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