This was created using Brushify SmartBrushes / Megascans / Sky Creator / Ocean System for Rendered Cinematics.
Sound On
https://www.unrealengine.com/marketplace/en-US/product/brushify-smartbrush-system
https://www.unrealengine.com/marketplace/en-US/product/sky-creator
https://www.unrealengine.com/marketplace/en-US/product/ocean-system-for-rendered-cinematics