Pure-sky

3DVision writes:

(Pure-Sky is a procedural world) that generates a realistic sky. Thanks to the independent management of the components, sun, clouds, stars and horizon, you can easily create day and night cycles for your animated films or architectural scenes. A huge sun, a purple sky, these components will also allow you to create this kind of surrealist and fantastic scenes. Pure-Sky is a tool designed for professional users (Freelance/Studio) of Blender 2.80,2.81(EEVEE & Cycle).

https://youtu.be/l6wjGbKNKbQ