The scene was rendered using only dynamic lighting (No RTX raytracing or baked lighting). Exsite is a set of non-repetitive material functions, procedural masks and blueprints created especially for environment artists that want to create natural environments without worrying about repetitiveness in texture tiling and asset placement. All effects were created in material with a basic geometry setup.
More info can be found here: https://www.artstation.com/artwork/eaLGmD and here: https://www.unrealengine.com/marketplace/en-US/product/exsite