Unreal Engine Code Plugins Asset Downgrader v5.4

Downgrade Assets From 5.4 to 4.27 or inbetween.

This plugin will downgrade assets for compatibility with 5.0.3 or 4.27 . It works by first upgrading the assets to Source Version (5.3-5.4), and then applying various patches to the .uasset files in order to make them compatible with the TargetVersion (5.0 or 4.27) but assets can then also be opened in UE5.1-5.3, just without the newer data (i.e. nanite data is removed for a 4.27 downgrade). Do note that features of the newer unreal versions (like nanite on masked materials, new material nodes, new niagara modules) can't be ported to the old versions.

How it works :

- First, backup all your assets as this plugin is highly experimental and in certain situations it may corrupt assets or crash the editor if something goes wrong.

- Either have 2 projects, one the SourceVersion and the other with the TargetVersion, or just switch versions for the project you're working with. Integrate the plugin in both projects.

- In the SourceVersion project, select the assets you wish to downgrade.

- From the Downgrader menu choose DowngradeSelectedAssets.

- Either migrate the assets by copy pasting affected files or entire folders with the assets or selecting say a level file, choosing migrate and then choosing a destination Content folder where the project on TargetVersion should reside. Alternatively, switch the version of the project to the TargetVersion

- If TargetVersion is a 5.0.3 project add

[Core.System]

UsePackageTrailer=True

to Config/DefaultEngine.ini

You will get a warning if this is not enabled.

- Open the TargetVersion project and then the downgraded assets. If there were no errors, the assets should open correctly. To be able to migrate these assets to other TargetVersion projects that don't have the Downgrader plugin, the assets need to be resaved through the plugin ( select all the assets and use the plugin's SaveSelectedAssets option ) inside the TargetVersion editor. Version: 5.4

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