Open your player.PLR file and search for line that says.. Code: Mipmap LOD Bias="0.00000" change it to... Code: Mipmap LOD Bias="-1.00000" See how that goes for you
Remember that this is never be the same, like providing proper, very hi-res textures. In fact, using too much negative LOD Bias can cause some visual issues (like aliasing) but if that works for you then why not?
Yea I know it is no substitute for highres texture packs but it does sharpen the textures nicely. -1 is usually fine for most cases. Any higher than -1.5 and you will start to see issues. It does add a bit more general clarity to the image.
It's the type of thing you only really see the benefit when you are playing. Screenshots won't do it justice. Just try and see for yourself. It's only one line to change in the file.
Note that decreasing texture LOD bias costs some performance. A value of 0.0 usually is a little too blurry and that's why modders / developers usually put some negative value there (between -1.5 and -0.5). If you want to know more about LOD bias, look here: LINK. Text refer's to OpenGL, so don't bother reading everything - just look at images and read their description.
I have never noticed any fps hit from altering LOD bias or AF settings at all. You could create a custom profile in nvidia inspector and set it there if you want.