Rays are drawed to lower resolution than screen and it depends from quality setting and they do not use additional computations on edges. Mine is always drawed to full screen size, that's why you don't see pixelization. And there are no textures you may edit, it's dynamic processing effect.
Gorgulla
My turbo boost answer is based on tests by users after you wrote about results.
Works fine for me and there is no reason to be different, this code is absolutely fail safe even with crapware running.Changing printscr key to 11 or 255 doesn't work
Do not modify iHWNumThreads, game is unable to work proprely with threads, everything is locks based which calls crazy amount of times per frame and these locks limiting performance mostly. More threads you have - more locks, more bugs.