Strange graphics change happening

[Halogen]

I'm playing a version of GWX, and anytime the camera comes out of the water (periscope or otherwise) smoke and clouds look normal for a moment, but then revert to a simplified version that looks crappy
Could this be a Anti-aliasing problem?
I should clarify what shows up is what seems like individual cloud or smoke textures instead of the seamless smoke or cloud effects you get before