Simulation of trees using Niagara. With this approach, you can simulate the development of vegetation, add decorative effects there. I was trying to create a full-fledged simulation using Niagara. Here are the links where you can buy these experiments
https://www.unrealengine.com/marketplace/en-US/product/ribbon-examples
https://www.patreon.com/posts/52357302
Examples of such simulations are available as part of my project on the marketplace
experiments
My tutorial on these themes