Hello!
I published graphic shaders from this demo, link https://www.shadertoy.com/view/WtdcW4 there in buffer CubeA shader that I used to generate sky.
Also, ~1-week later il publish Panorama-tool(application with UI) to make some simple panoramas, there also il include something like this panorama. Il publish it on my github https://github.com/danilw/godot-utils-and-other