Actually the texture problem is directly related to the savefiles, specifically to the base upgrades. If there are any upgrades made - textures would be blurred, models scuffed and laggy, and ofc. the same goes for all the dialogs and interactions that are made at base, and H/NTR-scenes.
It's not even related to graphic settings, i simply put save with open facilities and here we go, change it to save without those(or start a new game) and everything is fine again. Hope they are going to fix that...