While working on my next asset pack called “Forgotten Graveyards” I made those renders I wanted to share with you. I hope you enjoy them! 
One interesting aspect of this project is that I work with multiple engines at once, which adds a lot of complexity.
Unreal Engine render:
Unity3D (URP) Render:
Short video in Unreal:
Short video in Unity:
The major goal here was to showcase skeleton/bones models in “natural environment”. Here are the models I made:
And wireframe for one of them:
Additionally how they look in Unreal:
And in Unity:
Artstation link: https://www.artstation.com/artwork/9E4bOQ
Edit: I don’t really know how formatting of thumbnails work, but I see that in some browsers that square ones get cropped, so I added some black space around it.