Galaxy dust rendering & stargazing - Galaxia dev area September 2016

I've been working on a new galaxy rendering system for Galaxia. Still a work in progress, for example there's still not much variation between galaxies (they're still all the same really), but fixing that I think is the next step. There's still a bit of a lighting problem with the dust on the furthest side of the galaxy. Maybe adding the dust lighting in a separate rendering pass could fix it. I have also made an adjustment to the alpha blending for the planet atmosphere, so that now the atmosphere edges