Wow Rayraz terrific job, but there seems to be a typo here. Did you really mean EIGHTEEN THOUSAND 2d planes? If I used volumetric textures on 10 things in a scene my computer would melt down yet you said there are a few thousand volumetric spheres here. WOW!! You must have a nuclear powered computer. Once again nice work. I used to enjoy painting galaxies on the back windows of my cars. ( from the inside so they wouldn't wear off in the wind and rain )