My guess is OP means the anti aliased line and refers to it as fuzzy.
This is unfortunately the mathematically perfect representation of a line through sampling and averaging. We are bound by display pixel density and the fact, that we represent a mathematically perfectly straight line.
This issue, among others like moiré patterns and very high intensity samples against dark background not averaging to an anti aliased line, can only be solved by either image filters or in some cases super sampling.
You can try: double image filter size, render at 4x the resolution (twice height and twice width) and scale the image back down using bilinear image sampling to original size. This may help in this case getting rid of the fuzzy line, but in the end you are bound by the pixel density of your display. You can only get so mathematically perfect, before in Apples words "non retina displays" screw you over.
Otherwise, the standard method of avoiding these fuzzy lines is simply image filter increase the classic way.
edit: you can increase you display's pixel density by stepping back a meter, that should get rid of it :D
« Last Edit: 2016-05-19, 09:54:32 by SairesArt »

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