I have put together all the assets I used to create this final real time image composition of a limestone temple in a dense rainforest.

https://www.artstation.com/artwork/rAn4rm

I have included the rocks, foliage assets like trees and moss, architecture assets, and materials for the clouds, mist and waterfalls. As well as the cascade particle effects. All these assembled assets can be seen in this video.

https://youtu.be/5QVdSAvix8w

The assets here are built with a series of master materials that allow full flexibility in changing the color, textures, and top faces of the rock, foliage, and architecture meshes.