Not running smoothing on DirectX11

First noticed in GTA 5 where on DirectX11 even with maximum smoothing, markings on the pavement and many other very bad textures were smoothed out, if not smoothed out at all. There was also a ripple in the foliage and the grass. Switching to DirectX10.1 the problem disappeared, but still do not want to sit on it all the time, because the comp is pretty good, to pull the game on DirectX 11 on ultra. What could be the problem? Who faced? How corrected?