Environment Skin Sid Meier's Civilization VI graphics issue, pls help

[Haustmyrkr]

Hi all, guys!

I have some strange and really annoying graphics bug - after 3-5 minutes of gameplay all the colors ingame kind of crashin, it's like I'm playing on 16-bit console, dunno how how else to describe it, as if the bitness of the colors is drastically reduced.

Screenshot:

I've tried all lighting and shadows options, from simplest to maximum, all window modes and textures parameters - no result.

I'm using EGS version now. Earlier, 'bout year ago, all worked just perfect on another version of CivVI and now this.

System:

3770K
16Gb RAM
GTX1070

No effects like this weren't seen in any other game.

Thanks for help.