Having taken the original apart, its obvious why FXAA results in such blurred results - the pixel size is hard coded for a screen resolution of 1024x768, so if you're running a higher resolution than that, the shader is using too large an area, thus resulting in blur. I've fixed this "feature" and created three new versions of the FXAA shader, one with the resolution correctly calculated, one with the resolution correctly calculated and the sharpness of the shader increased (approximately equivalent to Bill's version, though I don't think he had the resolution fix) and one with FXAA off altogether.
The results are as follows (click on the thumbnails for full resolution, obviously resampling the images obliterates the effect).
First up, the stock Train Simulator 2015 FXAA shader (all of these are set to FXAA+2x2SSAA at 1920x1080):
Click the image to zoom in
Next, with the resolution correctly calculated (the effect is subtle, but contrast and detail are better):
Click the image to zoom in
Third, with the resolution correction and increased sharpness (further increased detail):
Click the image to zoom in
And finally with FXAA disabled altogether (much more detail and contrast, but more jagged edges):
Click the image to zoom in
I'm running a few tests just to check these don't cause any trouble (the haven't thus far and there is no reason that they should) then I'll get them uploaded.
Paul
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. My imagination or what I seem to be getting far less stutter when running Steam Loco's with Steam Sounds Supreme sounds installed and the Smoke particles effects are looking far smoother.