Some graphics I did (with a few original Fallout images as a base) for FOnline: 2238. It was supposed to make sewers look more like real sewers, because water on the same level as floor didn't look particularly well. Initially I planned much larger set, sewers are an interesting setting for PvE dungeons and quests, but I never had time to finish it. Still, what there is, is quite useful IMHO. So I release it.
License:
WTFPL (but take into consideration the drains are modded F2 drains not drawn from scratch)
DownloadReference:
Example of use: