Brush manager in Unreal Engine 5.4 with World Partition

[DetHlyOmen]

I am wondering if anyone has found a fix for non-source builds in Unreal Engine 5.4.4 to be able to use a landscape Brush Manager with world partition. As it stands, Using the Brush manager for landscapes still causes the entire world to be loaded at once. I want to build the basics of the world through non-destructive methods but as soon as I add the Brush Manager to my level, any subsequent loads of the map have the entire map loaded into memory. I have tried to make custom blueprints to replace the brushes and the manager but nothing is seeming to work for me. Anyone have advice on this topic?

[BRGEzeHulton]

Hello DetHlyOmen, let me help you with this. When using the Landscape Brush Manager with World Partition, it creates persistent dependencies on the landscape, which prevents World Partition from properly unloading cells. As a result, the entire world is loaded into memory, even on non-source builds.

I recommend either removing the Brush Manager or disabling the “Affect Heightmap” option in its settings. While this solution isn’t perfect, it allows World Partition to manage memory correctly.

Currently, there is no straightforward fix for non-source builds. While custom brush systems may help, they require more complex setup.

I recommend that you read this topic.

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World partition landscape is always loaded in the editor. it works fine in the game but due to its big size, it lags and crashes the editor. I tried unloading it from the world partition window but when right clicking there unload options are grayed out which means its already unloaded , it only gives option to load it . I tried loading it and then unloading it but it doesn’t unload. It is also not pinned in the outliner. Thus I am at a loss as to how to unload it. Your help is really appreciate…

World Partition Doc:

World Partition in Unreal Engine | Unreal Engine 5.5 Documentation | Epic...