Buy it here: https://artstn.co/m/2Jdj
Hey folks, as much as this is an advertisement for my own product I'd just really wanted to show off about this. Originally I produced the nebula generator for a game which unfortunately went nowhere. 6 years later I decided to release a few images based on this generator... so here they are as backdrops you can use for your own thing.
The nebula generator is absolutely capable of producing fantastical images, although it is a bit limiting. Maybe one day I'll port this over to tools such as Blender... or Substance Designer. For now it'll remain as a thing for FilterForge.