This node group is aimed to simulate a fake night sky, with random dispersion of stars. In addition, there is a fake Milky Way, with a parametrable density of stars and halo.
To achieve a more realistic earth-based night sky, there is furthermore the possibility to add a horizon color, which fade from ground to zenith. This color influences the brightness of the stars in horizon area, in order to simulate the adjonction of light.
The sky color is the « screen » on which stars are projected. Sky luminosity have thus an influence on how many and how bright stars are visible. In fact, a day color setup for the sky will produce faint and rare stars, and indiscernable Milky Way halo.
This is a great resource! I am surprised you haven't got more favs. I know I will use this.
Thanks Holmen for your kind comments. To propose a complete understanding of this node group, you could find a documentation on http://www.effeprod.net/spip.php?article69.
Well explained! Thank you for the PDF from your site! Link wasn't direct, but i found it. http://www.effeprod.net/IMG/pdf/night_sky_with_milky_way_documentation.pdf
The direct link to pdf cannot work because the underscores are interpreted as italic
This is a great resource. I am surprised you haven't more favs. I will use this in night scenes, beats the shit out of the stars that come with Blender.