Any ideas of how I would make a grass model look like it's moving as if there's wind?
If the grass is a MeshPart
then resizing it which would stretch and distort it could achieve the right effect.
You could also have the parts jitter around like grass would, rolling in the breeze.
Or if you're really hardcore you could make your custom grass animation, or do some CFrame
lerping. But it all depends on your circumstances