Realistic Nature Scene Render Compositing

While creating this scene the biggest challenge was 

Compositing the mist and splashes in the environment.Modeling was easy and textures were also easy to apply. One thing that I learned by visiting many forums that Ambient occlusion maps is more realistic if we apply it in compositing step instead of adding it to the Principled BSDF coordinate. Volumetric setup play crucial role in creating a scene with clouds.

I rendered elements separately to reduce the load from my GPU and CPU.

I used HDRI lighting setup.

Rendered on Eevee at 400 values.