I just found this effect about two weeks ago or less.
It is an amazing way to blur and brighten an image. Stressneffect by itself with replace / normal blend options isn’t too interesting.
Change the blending option to divide.
Set opacity to around 64 or 78.
Set radius to 700 or 1000
5 to 10 samples
Set Interations to a level that clears up all the bright specs.
Another blending option using stress that really makes a difference is difference. For some images, it gives an entirely new and interesting style.