While driving around aimlessly just taking in the sights, I thought to myself, "GTA V has some of the sharpest textures in any game that I've played and yet they seem pretty blurry in the distance even though 16x AF is apparently on. Let me check that."I am here to report that in-game AF is, in fact, broken, at least on my AMD 280X. Here are some comparison screens between in-game 16x AF vs. forcing 16x AF in drivers. I only quickly put this together as I'm sure there are better locations to demonstrate this. In-game AF on top with driver-forced on bottom. Do excuse the jaggies: FXAA is off because I prefer sharpness and I don't notice the jaggies when the game is in motion.The main thing to note in these screens is how sharp the lines on the road are. See how with in-game AF they blur pretty quickly and become fat whereas they stay narrow and sharp when AF is forced.On this golf course, you can see a ton more detail in the driver-forced screen, even on the nearby grass, and especially note the caddy car tracks which were still there in the in-game AF screen but I had to drive way closer to really notice them.Conclusion: at least on AMD, force 16x AF on in your driver settings.EDIT: An obvious difference that I found as I started driving out of the golf club: