can't get SMAA (depth edges only) work in the witcher 3

i searched for this problem on this forum and on google and dind't find anything, so im sorry if you already have this trhead

but i can't get SMAA depth mode work in TW3
i know that color mode is better but it creates texts distortions, i tried to mess with diferents settings like edge detection threshold, corner rounding and predtion threshold and it will always distort texts

but when i select the depth edge mode nothing happens, i used the debug mode to view edges and it just show e a black screen with the depth edge mode selected

am i doing sonthing wrong? or is this suposed to not work in TW3?