cover: sightdefense bonus
light smoke+1D
thick smoke+2D
very thick smoke+4D
poor light+1D
moonlit night+2D
cpl. darkness+4D
cover: objectsdefense bonus
1/4 covered+1D
1/2 covered+2D
3/4 covered+4D
fully coveredno hit
protection: sight"strength"
flimsy wooden door1D
standard wooden door2D
standard metal door3D
reinforced door4D
Blast Door6D