JackDole, yes that's correct! you can choose two nebulas, i posted some screenshots in the other pages. Just give me the names of which nebula you want. (there is also an outdated changelog at page 9)
there is still the first picture left whoever knows this nebula can also choose two nebulas!
While admiring Bambusman nebulas I arrived to this web page: http://www.nebulabliss.com/explore.html This is pure awesomeness. I hope SpaceEngineer make contact with Eugene Grachev (the programmer of this semi-procedural nebulaes)
FastFourierTransform, i know that site it's pretty cool to see some nebulas in 3d. The next release will also have (kind of) realistic 3d nebulas but ofc not complex ones like these, because it's impossible (i think) to do that in SE.