Foliage like grass, bushes, trees actually animate in the material using World Position Offset. It’s just a static mesh. Probably with enough vertices to bend? Quixel has grass assets you can use.
The foliage tool is pretty simple. Make Static Mesh Foliage for the static meshes, drop it in, and paint.
If you want a grass landscape material, there are free ones on the marketplace or I’d follow a tutorial and then one for interaction. They’re both a bit involved.
There should be a simple tutorial for adding wind to the grass material as well.
For some reason I got into assuming you mean grass. Don’t make me rewrite this lol. Because you said transparent png I assumed grass.
Bushes, I forget exactly how I did interaction but if you need that and can’t figure it out I can check. It was an actor overlap event because I wanted multiple things to happen with bushes.