-toss a smoke nade between a soldier and an alien
-end turn, you lose sight to the alien as it's behind smoke
-your next turn begins and smoke disperses, alien is still not visible but it should
-until your soldier moves (or even just turns), then he will suddenly see the alien right in front of him
see screenshots:
in 1st, it's player turn, smoke deployed
in 2nd, it's alien turn and aliens can not be seen as they're behind the smoke (except for the spider that moved through the smoke)
in 3rd it's player turn and soldier has moved 1 square, aliens in front of him become visible