[water physics bug] Besides you have to mediate more than 12 hours to load water tessellation, you have to open world map to see water splashes behind your boat. Every time you stop the boat and sail again, water splashes will disappear, open the world map again will fix it.
[texture flickering bug] At the hill top where you encounter a royal wyvern (contract), there is a cave, texture flickering really mad at the entrance of the cave. There are also spots outside the cave where you see green moss texture flickered to dirt texture and such while Geralt moved around. Some other places also have similar texture flickering like that, those hay roofs for instance. The hill top I described also have some weird lighting flickering, tends out that at some spots if you move your camera at a certain angle will change your gamma or sth. like that. This has nothing to do with sli (repeatable in single card). My rig: GTX980 sli, I7 4790k, 16g Ram, 512G SSD. My settings: 2560x1440, fullscreen, vsync on, fps unlimited, all ultra.
I know the game has different draw distances for every map and weather, I just hope we can adjust it in the near future.