The gui looks blurry when not used it its predefined resolution
The real reason it looks blurry is not directly related to the the rescaling. Probably they go off the pixel grid after the rescale.
For example a rectangle with screen coordinates "x, y, w, h" = "0.5, 0.5, 1, 1" would look blurry.
But "x, y, w, h" = "0, 0, 1, 1" would look nice.
I wonder if q3 snaps to pixel grid after the rescale
Also, font rescaling (independent from gui rescaling) affects the outcome
Edit: since I am not allowed to post in a relevant topic just because it is old, I will create a new one