By now, on the 30x series of Nvidia, you can probably ray trace shadows with 32+ rays while rendering everything else Not in ray-trace to get an Ok performance.
@Renanmgs
Disable WPO, see if it’s still fuzzy or not.
Oh and you can also check your velocity output to make sure something is rendering in there. For ue4.22 to .26 or something it was broken entirely.
In fact, knowing from other reports that render targets are not able to have opacity, I would not be surprised?