And finally - here are the initial sketches and the first color concept I made.

The full scene is textured with these three textures. The ambient occlusion is baked in the vertex colour.

With some parameters change you can achieve a great variety of skies.

The sky in a timelapse:

The sky was also a challenge. It's fully procedural.

Wireframe of the scene. The water was a real challenge to make in eevee. Since I could not get the depth buffer I had to use a trick. I made a small geometry nodes modifier that gets proximity from objects in a group and writes them down to a colour attribute.

Thank you!

I had some complains before because it requires an email ...
Github was way too complicated for many people... I guess in the end I can never make everybody happy..

Thank you!