How about adding signs and lights to the game?
It would be pretty awesome, just imagine making a huge trench system and putting a sign that says "URNAMEHERE TRENCH SYSTEM" and for lights, why not make an underground bunker and put lights in there so you can see?

Lantern?

YUS LANTERN :D

not a bad idea, underground bunkers tend to get annoying when you can't see diddly squat

:)