I am looking to buy some plug-ins to help with nature scenes. Should I go Graswald or Grass Essentials? Also, I want to do more complex fluid sims and I was wondering if it is worth it to buy the Flip-Fluids add on. I heard that 2.8 is supposed to have the new Mantaflow fluid simulator, but is it going to be any good? If anyone has advice, let me know. Thanks!