Hey Defused,
I’ve gathered a few documents and tutorials for you to go through regarding ‘wind directional source’. The video that I’ve included is a bit dated however, it should be able to visually guide you in adding wind to your grass.
Please keep in mind that wind doesn’t affect anything, except for APEX clothing and foliage (which has to be set up through the material). It does not recognize any other geometry and bend around it.
I hope these help! Good luck!
[Unreal Documents][1]
[ - Adding Wind to Grass][2]
[Forums - Simple Grass Wind][3]
Working with SpeedTree Models in Unreal Engine | Unreal Engine 5.1 Documentation
[2]:
[3]: SimpleGrassWind - World Creation - Epic Developer Community Forums