L3ron, you will be disappointed, completely scrapped that background, I just couldn't do the nebula without brushes and a tablet, I think.
After much experimenting, I found a way to make awesome nebulae without brushes, but they need a black background to work, so no colours in the finished piece..
Finally, after finding a way to colour the nebulae and much tweaking, I had an awesome spacescape.. but the planets didn't really fit
But at that point I just wanted the planets to fit in and somehow worked them in, too bad they mask the nebulae now -.-
Anyway, here it is:
Spacescape 003
Bigger version:
http://img835.imageshack.us/img835/2035/spacescapenew1500px.png
There is also a HUGE 4000px*3000px version, will be uploaded on request.
Maybe Sozo has some ideas on how to make colourful spacescapes that look good