The shaders I wrote aren't supposed to turn an ingame scene into a pixelated-with-no-antialiasing image. The screenshot didn't look very different before. They were meant to support lowres pixel-art by using postprocessing shaders which were specifically created for this style.
, yes I know, no misconception. Maybe bad wording on my part . I quess with pixel art I personally think more about extreme pixelated games. Maybe not the best example but oh well;