>uwar's grass is pretty cool,
someone (probably you!) in a mission a long time ago, in a galaxy far away revamped Malden using uwar grass and the effect was a good one. While it was a fairly easy thing to do, over-riding the official names with uwar and hence getting the new models, the overall effect was similar to some of the very very excellent eye candy in @farmlands.
I doubt the intent was to protect, or un-hide the player, (which is the 2nd part of @Coot's question) just provide a little more cover to slither trhu. Pity that #@*_*$#@_ Thobson didn't use it in Abandoned Armies, I would have survived longer
>make the player and AI "get high"?
well this is off topic and I wont mind if a moderator slaps me, but yes, there is. Umm errr, there's a few missions out there which use 'experimental pill' as part of the action menu. Forget the names of course, but any1 who's played them would know what I mean i think. It's a modification of SlowMo, that @MrN has used for other purposes in his CatAfgan missions.