I meant this without the perlin noise background but the nebulas themselves have dark spots:
I also thought about a planet generator which may be a good fit with these backgrounds (if we only cropped from the planet are):
The idea of having an app that generates these planets instantly it isn’t new, I thought about it when I was discovering how these planets were made.
I unfortunately wasn’t able to make a whole app that just does this because I didn’t know how to even start with (e.g making the texture a sphere). However I made a text version that just drops randomly generated info. I still think you can do something like this!