Sounds great!  I can hardly wait to see it.  You know, I just had an idea I may post on the Daz forums.  A lot of people use Carrara for space scenes, yet, as it is now, you need to go into a 2D program to do starfields and nebulas etc.  Why couldn't the basic realistic sky system be adapted to also do space backgrounds?  I think the only major bit of reprogramming that would need to be done would be to put in a generator for stars and suns.  The existing cloud system can be used to simulate a nebula. And get rid of the stupid horizon if your not enabling the ground...  That annoys the living heck out of me.  To get the horizon down below the render scene, ya have to set it at like -7000' or more.....  I think when you disable the ground, the horizon should be gone, period.