GRASS and WEEDS can block LOS
These interesting observations were noticed during my earlier ATG tests.
The Russian 76mm ATG has a clear LOS to the PzIVH, the map is pancake flat so it's what you'd expect-
but surprisingly as we move the target line around, we see he
doesn't have LOS to the actual ground itself near the panzer!
Another view- clear LOS to the tank-
But if we shift the target line to the ground near the tank, LOS is blocked!-
This shows why, the LOS line is okay up to here-
but is then blocked by that clump of weeds (circled) if we try to extend it further-
The moral is- Tanks/trucks/Guns etc stick up above ground level and can be seen and shot at, but if we try to target a spot on the ground near them for area-fire, LOS to the spot may be obscured by clumps of grass and weeds.