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Since i don't have any recording software ATM, i can't upload it but the pics and information i posted before is HOW THE FREAKING GAME is actually working right now (i just test it again).
You can be delusional and live in a world where a green icon provides you with placebo cover, or you can actually launch the game and see how the 2 guys on the weapons are dying as if they had no cover whatsoever.
Edit:
I'm amused by the level and variety of bugs this game has. AT gun cover operators (so i can found this post later)
@Smith do you think this is possible to fix so it works as it should (operators getting cover all the time)?
There's a fringe case on which operators DO benefit from cover. I only made the test with the Zis and the Pak40 with a single Ober model (vet3 for acc) and Gren (for Rifle nade).
-If the weapon is aiming at the center of it's arc, there's no cover whatsoever. You can move around 360° (just in case the directional cover was bugged) and you will still hit for 16dmg (Kar damage model).
-Now, when the weapon move to the limit of the arc, there's a pretty small window/arc on which the operators will benefit from having green cover ONLY at something like 20° from the center of the position at which they are aiming. This will affect small arm fire and explosives (note: explosive cover consideration only matters for the position from which it was fired, not where it lands).
-It seems that each AT gun might have a different arc on which cover applies when aiming to the sides.
Orange side is the position on which you fill benefit from cover.
Edit2: even more fun.
USF:
When looking to the left, it doesn't provide green (shield disappears). Yes when in middle and to the right. Pretty small gap of cover when looking to the right, same to the left depending on which model it is targeting.
SU:
The opposite, when looking to the right no cover but there's a small gap on which 1 of the models has cover. When looking to the left, the green cover applies up to 180 going counter clockwise from the center.
OH:
Same behaviour as Zis but on both sides. More cover.
UKF:
Same as Zis.
TL;DR: Update on the situation. You basically get no cover on operators 90% of the time unless they are aiming at specific points depending on each AT gun.