Rockstar has released update 1.10 for Grand Theft Auto 5, which it states addresses "graphical issues across GTA Online and Story Mode".
The update is a big one, coming in at 4.7GB, but it does restore parallax occlusion mapping to the game, while the performance boosts introduced with update 1.09 remain in effect.
Rockstar has also addressed an issue which saw some characters' apperances changing randomly.
Earlier today, Rockstar released a 60FPS trailer for the PC version of the game, which launches for the platform on April 14th.