Unlimited_X MOD is a modification based on Homeworld 2. It will set up a new world for the players - new storyline and background infomation, new races, new maps and new effects.. etc. UXMOD will just has a develop team of one moder. It's somehow a "private" mod containing the moder's imagination.
Some new screenshots of a new background.
Well, in fact I used to worry that the original HW ships may not look very suitable to these new backgrounds with another art style, but now I think they looks good as well:)
-UX
I think it's more a matter of getting the lighting right, rather than having Homeworld-ey backgrounds.