Fixing trees hovering up and down in Unreal Engine

Recently we have found out that many Unreal Engine users encounter a weird issue, which is trees hovering up and down instead of moving from side to side in the wind. This causes a lot of frustration and not many users know how to solve it. In this article, let’s try to fix it.

Many users report that this issue of trees hovering up and down happens on Unreal Engine 5.1 or 5.2, and only when they use a Procedural Foliage Spawner or paint trees in Foliage Mode instead.

This issue is caused by the Wind shader. To find and tweak it, you should go to a material of a mesh that is affected, double click it.

Then go to parent material in the section “General”, click it until you get to the material “MA_Foliage”. In the node editor, search for the node “MF_SimpleWind” and double click it.

After that, you will see “Main Rotator” comment, just double click on the node “ObjectPivotPoint”. In this graph, adjust the node “Transform Position” with Source = Instance & Particle Space and Destination = Absolute Worldspace.

You can follow this instruction video to better imagine where the node “MF_SimpleWind” locates:

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Source: forums.unrealengine.com, Unreal Realism Youtube channel, reddit.com