Numerous people on both amd and nvidia as well as integrated graphics have state that their problems did not start until 1.3. These post are literally all over the forums here and at Steam.
I have almost 800 hours in this game. I really like it. To bad this last patch has made rainbow textures, grainy items, walls of textures where there should be nothing, and my latest favorite, falling into the map. I had no problems previous to this patch. As did a whole bunch of other people.
Edit. I don't use mods, console, and have not messed with the ini files.
So simple question. When are you going to fix the graphics YOU broke with that patch.
Make some noise people, maybe they will finally listen.