Some short clips of a small VR test scene I put together using photogrammetry assets (mostly my own, plus Megascans for the big cliffs), my own full-CG sky HDRI rendered in Blender, custom rendered cloud cards, as well as my own custom shaders made in Amplify Shader Editor for clouds and an ocean shoreline. Please excuse the low resolution, these are old GIFs mashed together into a demo.
The shaders use very simple techniques to accomplish their visuals. They are highly optimized and suitable for VR.
Made in Unity's Universal Render Pipeline.