Messing with maps...

At this point i guess that "trash" is actually what it would look good inside another map which shares the map type, but different tileset, like the map which contains Vector castle(inside) and then you mean that if i remove those tiles, then the map which would have those map tiles looking good(because it's the room you enter in) would disappear because i removed it... right?

Say that i'll never enter in that map because i might potentially cut it, since it's a WoR map which don't appear in WoB too... (South Figaro basement for example appears in both the worlds) any risk that it might create any hole in WoB maps?