I just rolled back to the orig build, no stutter and completely fluent gameplay. Noticed that there are certainly footstep sounds for the grass-less surface, so I'm convinced the rpt that zuff found is the cause of the problem.

For me it makes the game unplayable; made a test with 2 groups against each other in an area with much of the grass-less surface. Normally I play with around 40 fps, it went down to 15-20 with massive stutter making it totally unplayable.

Delete plz, problem solved in latest dev build.

@michelsendk: Hmmm, this is getting subjective and maybe we've had different situations we remember. I guess a more scientific approach is necessary, I'm sure grenade's producers are able to give quite specific information depending on wind, temperature, etc. This would be up to the devs and implement it.

In my experience the area covered may have been slighly bigger, but the smoke seemed way more transparent and often sort of sticked to the ground. I was APC gunner (vognkommandør) and used to throw 2-4 smoke grenades at a time to cover the APC during assaults or reversing maneuvers.
But maybe they have greater effect if you've used them during eg. CQB training, as the smoke would fill enclosed spaces better than the open (windy) terrain I am used to.

@michelsendk: I suppose you were in the Danish army, like me. Funny how we disagree, as we must have used the same smoke grenades, he he. It's all so subjective.

I don't agree. Having been in the army I think sometimes the vanilla smoke in Arma 3 is a bit too much. I also liked the Blastcore smoke from A2, much more realistic. It all depends on the wind though.