HUDE fps drop and textures flickering near SHIP on the north of the map. (this big ship on the coast). I got FPS drops while standing near rocky ground near that ship.

Windows 7 SP1
AMD RADEON HD 7870 - 2GB
INTEL i5 2550K
8GB RAM

In this experimental build I see a lot of textures in like "low" settings, when I am at any quality set. FPS is the same, but quality is worse