# Speedtree Shadows black with Wind

**URL:** <https://forums.unrealengine.com/t/speedtree-shadows-black-with-wind/472105>\
**Category:** Rendering\
**Tags:** dark, speedtree, normals, Shadows, unreal-engine, question, wind\
**Created:** [October 1, 2020, 5:58am UTC](https://forums.unrealengine.com/t/speedtree-shadows-black-with-wind/472105 "2020-10-01T05:58:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Anamatis](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Anamatis](https://forums.unrealengine.com/u/Anamatis)\
**Post date:** [October 1, 2020, 5:58am UTC](https://forums.unrealengine.com/t/speedtree-shadows-black-with-wind/472105/1 "2020-10-01T05:58:40Z")

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Having a strange issue with either - Normals, Subsurface, or shading of some kind.

My tree looks fine in Speedtree 8.4 - lightmaps are perfectly green and good to go.  
Importing with created materials checked etc.  
Trees look more or less fine at a standstill in UE4. As soon as I add a wind volume, the movement in the fronds causes the frond meshes to clip in and out of black. Seems there’s some issue with the underside of my frond meshes?