14 large (825px+) nebula brushes. Created in Apophysis. All - but one - are single rendered images. No post processing was done.
I used the 'spherical' setting in Apophysis, as was suggested in the nebula apophysis tutorial of synax444 - which I recommend to view as well.
Some of them might need a bit of work when implanting into a space scene. Please credit me when you use the brushes in your artwork