artimrj wrote:What blurs on your hud? Can I see a screen shot of it as I do not have any blurring that I know of.
FXAA is a full screen anti aliasing by slightly blurring the whole screen to make jaggies less apparent. The F3/F4 HUD is part of your full screen and gets a little blurred too, esp. the small text.
There is a better and more technical explanation in the text file that accompanies the download. The thread also has some comparative screen shots and user reviews.
Interestingly, the author mentions that the original FXAA shader only uses a SVGA part (1024*768) pixels of the window, probably due to the ancient MSTS roots of Railworks.
I believe with FXAA out of the way, you can probably use the more potent image enhancement of your video card drivers. That, however requires lots of tweaking.