http://www.youtube.com/watch?v=b90WQdettqU

That is good to know about the ghillie suit. Tao will have to give the snipers in his variable mission the ghillie suit to help us hide. Hell, Meatshield and I could have taken that entire town if we had a better ability to hide!

those vids are done with ACE though, it could be (and very likely is!) completly different in vanilla arma2

I don't know about the ACE, but I always thought that smoke was worthless.

Is ACE using the Zeus AI mod?

Since some patch made after that video was current, smoke grenades do block AI sight.

Many of the other effects are ACE specific, as well, such as the armor damage system.

It's definitely true that ghillie suited snipers are less visible to the AI, though. Terrain, etc. is irrelevant -- it's a hard-coded multiplier.

Does vehicle smoke block target lock?

Since when Gunship helicopters (such as the Apache) having bulletproof glass is a myth??
The video maker contradicts himself when he fired several shots at the Apache and most of them didn't penetrate the glass -> Only after many shots fired and hit on the glass was when the glass was finally penetrated and the crewman killed just like happens with REAL BULLETPROOF GLASS -> Bulletproof glass doesn't mean it cannot or will never be penetrated by bullets!! A bulletproof glass can be penetrated specially if several bullets before already hit and weared out the bulletproof glass or part of hit. And example of a vehicle glass that doesn't have bulletproof glass is the civilian car where with ONE shot and ONE hit it will penetrate the glass and kill someone inside the car is on the bullet's trajectory!

Really, people must stop thinking that bulletproof glass is just like or behaves like a thick steel or composite armored plate seen on armored vehicles like Tanks.