Unwanted Foliage Lod Morphing

Development World Creation
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1

Hi,

Wondering if anyone could help. We’re working on our project foliage at the moment and having some troubles with the loding. We’ve set up the foliage with 3 lods with manually set transition distances. But both in the editor and in the map the foliage seems to “morph” from lod0 to lod1 way too early - before it gets to the transition distance. Please see attached video link:

It doesn’t do this morphing when we only have a single lod, but when we do it starts morphing into lod1 almost immediately making the foliage disappear. So just wondering is this an advanced UE4 feature that tries to smooth transitions between lods? Is there a way to stop it occurring, or any settings to stop it starting so early…

Many thanks,
Bruce

2

Hi, okay found what it was… There was a SpeedTree node in the leaf and branch materials connected to the world position offset pin. In the SpeedTree node “Lod Type” was set to “Smooth” rather than “Pop”. This was causing it to morph between lods, with no settings for when to start - think it might have even lost a link to the next lod, so the meshes were almost completely disappearing…