Why are my textures blurry? This is an image of a 50 samples render of my scene. I know, low samples but no matter what samples I render it at the textures are always blurred. 



This is my camera options.



And this is my render options. How do I un-blur these textures?
That looks like Minecraft, in which case the textures are intentionally low resolution. You're looking at interpolation, which is normally good, but not for this. To turn it off, go to your image texture node and change Linear (the texture interpolation) to Closest.