UE5.1 – Bug HISM / Instanced Trees with Nanite

If your tree’s behave differently in UE 5.1 compared to UE 5.0 or UE 4.2x, it may be linked to the way the pivot is handled in the material in UE 5.1.

Look if your shader is using the Material Function ObjectPivotPoint.

Update your shader to use the Mesh Particle Pivot Location instance instead of the Object Pivot Location.

Source

https://forums.unrealengine.com/t/nanite-foliage-with-wind-sway-material-effects-placed-via-procedural-volumes-ue-5-1-0-may-seesaw-sway-together-with-all-other-foliage-in-the-same-procedurally-generated-volume/693655/1