Help me out here(Dealing with maps)

Hey guys, since my last question about L4D maps, which I could only find a few in Bsp format but still wont work, I need some suggestions on some maps. I know that theres some good maps that put you in space, but I kinda need a space map with a nebula cloud in it. I’ve searched before hand. I would like the link to the map(s) and Im searching right now to see of there is one. A good city map would also be appreciated as well as a urban warzone map setting and not the ones based off of HL2. Thanks.