I'm going to add detail, LOTS and LOTS and LOTS and LOTS and LOTS and LOTS and LOTS of detail, after I get the basework done, and change textures, modify layout, etc...I've been mapping for years (since I was 12, no less!) but I haven't used many modern editors...
Anyways, the first public beta is here:
Download Link(Barely any detail/lighting yet, and I know the bunkers should be lower)
Plus I have FINALLY got the hang of ArghRad, so sun lighting looks fairly nice (sorta...)
I've never actually played real paintball though...
Hopefully when you release the new map format I can still use GtkRadiant to map...