Check windows display scaling, make sure it's set to 100% for your output.
Why is there scaling involved? A 1 pixel square is getting translated to a 1 pixel square. What we're seeing in your image on the output transformation is interpolation of a pixel with its neighbouring pixels. What we're seeing in Zyper's image on the output transformation is the same interpolation of a pixel with its neighbouring pixels. I don't understand why this interpolation happens. If I'm sampling a single pixel, I shouldn't see that pixel mixed with the color of its neighbour.You see the fades on the slice edges because of how the algorithm of the scaling works.