Okay, seems I made a little mistake… For windweight I was using a TextureObject to mask out the part of my foliage that was allowed to move. Putting in a scalar value it works. The result can be plugged into WPO directly.
Now there’s a different error: If I get to close to my object it disappears ^^
Going to look into this further… However, if anyone has a working example, feel free to post here